augment

To increase; to make larger or supplement.

[with oneself] To grow; to increase; to become greater.

To increase an interval, especially the largest interval in a triad, by a half step (chromatic semitone).

To add an augment to.

To slow the tempo or meter, e.g. for a dramatic or stately passage.

An increase.

A grammatical prefix

In some languages, a prefix *é- (अ- (a-) in Sanskrit, ἐ- (e-) in Greek) indicating a past tense of a verb.

Especially Old Irish, a preverb, usually ro-, used to give a verb a resultative or potential meaning.

In some languages, an additional vowel prepended to the noun prefix.