Injunctive mood
Encyclopedia
The injunctive mood was a mood in Sanskrit
Sanskrit
Sanskrit , is a historical Indo-Aryan language and the primary liturgical language of Hinduism, Jainism and Buddhism.Buddhism: besides Pali, see Buddhist Hybrid Sanskrit Today, it is listed as one of the 22 scheduled languages of India and is an official language of the state of Uttarakhand...

 characterized by secondary endings but no augment
Augment (linguistics)
In linguistics, the augment is a syllable added to the beginning of the word in certain Indo-European languages, most notably Greek, Armenian, and the Indo-Iranian languages such as Sanskrit, to form the past tenses.-Indo-European languages:...

, and usually looked like an augmentless aorist
Aorist
Aorist is a philological term originally from Indo-European studies, referring to verb forms of various languages that are not necessarily related or similar in meaning...

 or imperfect. It typically stood in a main clause and had a subjunctive
Subjunctive mood
In grammar, the subjunctive mood is a verb mood typically used in subordinate clauses to express various states of irreality such as wish, emotion, possibility, judgment, opinion, necessity, or action that has not yet occurred....

 or imperative
Imperative mood
The imperative mood expresses commands or requests as a grammatical mood. These commands or requests urge the audience to act a certain way. It also may signal a prohibition, permission, or any other kind of exhortation.- Morphology :...

 meaning; for example, it could indicate intention, e.g. "Indra's heroic deeds will/shall I now declaim" (Beekes 1995). It was obligatory for use in prohibitions, where it follows mā́. In later Classical Sanskrit, only the use after remained (there are no accents in Classical Sanskrit).

Ancient Greek
Ancient Greek
Ancient Greek is the stage of the Greek language in the periods spanning the times c. 9th–6th centuries BC, , c. 5th–4th centuries BC , and the c. 3rd century BC – 6th century AD of ancient Greece and the ancient world; being predated in the 2nd millennium BC by Mycenaean Greek...

 has words that are formally similar to the Sanskrit injunctive mood, consisting of aorist
Aorist
Aorist is a philological term originally from Indo-European studies, referring to verb forms of various languages that are not necessarily related or similar in meaning...

 and imperfect forms lacking the augment
Augment (linguistics)
In linguistics, the augment is a syllable added to the beginning of the word in certain Indo-European languages, most notably Greek, Armenian, and the Indo-Iranian languages such as Sanskrit, to form the past tenses.-Indo-European languages:...

. However, in this case there is no difference in meaning between these forms and the normal augmented forms. These are normally used in Homer
Homer
In the Western classical tradition Homer , is the author of the Iliad and the Odyssey, and is revered as the greatest ancient Greek epic poet. These epics lie at the beginning of the Western canon of literature, and have had an enormous influence on the history of literature.When he lived is...

 and other epic poetry
Epic poetry
An epic is a lengthy narrative poem, ordinarily concerning a serious subject containing details of heroic deeds and events significant to a culture or nation. Oral poetry may qualify as an epic, and Albert Lord and Milman Parry have argued that classical epics were fundamentally an oral poetic form...

 (see Homeric Greek
Homeric Greek
Homeric Greek is the form of the Greek language that was used by Homer in the Iliad and Odyssey. It is an archaic version of Ionic Greek, with admixtures from certain other dialects, such as Aeolic Greek. It later served as the basis of Epic Greek, the language of epic poetry, typically in...

).

It is generally assumed that the augment was originally a separate particle meaning something like "then", added to indicate the past time of a form that was once mostly aspectual
Grammatical aspect
In linguistics, the grammatical aspect of a verb is a grammatical category that defines the temporal flow in a given action, event, or state, from the point of view of the speaker...

, and neutral with respect to tense. Originally, its use appears to have been optional, added as necessary to clear up an otherwise ambiguous expression, similarly to time adverbs in Chinese
Chinese language
The Chinese language is a language or language family consisting of varieties which are mutually intelligible to varying degrees. Originally the indigenous languages spoken by the Han Chinese in China, it forms one of the branches of Sino-Tibetan family of languages...

. Gradually, it fused onto the verb form and became mandatory, but in the early stages of Greek and Sanskrit this change was not yet complete, and hence augmentless forms existed side-by-side with augmented forms. The modal semantics of the augmentless forms may then be a later development within Indo-Iranian
Indo-Iranian languages
The Indo-Iranian language group constitutes the easternmost extant branch of the Indo-European family of languages. It consists of three language groups: the Indo-Aryan, Iranian and Nuristani...

 or Indo-Aryan
Indo-Aryan languages
The Indo-Aryan languages constitutes a branch of the Indo-Iranian languages, itself a branch of the Indo-European language family...

. It's also possible that the modal semantics developed in the parent language and later developments in Pre-Greek removed them and put back the basic meaning of the aorist and imperative, by analogy. (This hypothesis, however, contradicts Occam's Razor
Occam's razor
Occam's razor, also known as Ockham's razor, and sometimes expressed in Latin as lex parsimoniae , is a principle that generally recommends from among competing hypotheses selecting the one that makes the fewest new assumptions.-Overview:The principle is often summarized as "simpler explanations...

.)
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