augment

To increase; to make larger or supplement.

The money from renting out a spare room can augment a salary.

To grow; to increase; to become greater.

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

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

To add an augment to.

A grammatical prefix

The augment is found in Greek, Indo-Iranian, Armenian and Phrygian.

A grammatical prefix

Fundamentally the augment characterizes a verbal action viewed from a non-contemporary standpoint, either the moment of speaking (or writing) or a further verbal action.

A grammatical prefix

An increase.