augment

fe’l verb

1. To increase; to make larger or supplement. The money from renting out a spare room can augment a salary.
2. To grow; to increase; to become greater.
3. To slow the tempo or meter, e.g. for a dramatic or stately passage.
4. To increase an interval, especially the largest interval in a triad, by a half step (chromatic semitone).

ot noun

1. (grammar) In some Indo-European languages, a prefix e- (a- in Sanskrit) indicating a past tense of a verb.
2. (grammar) In some Bantu languages, an additional vowel prepended to the noun prefix.
3. An increase.