подли́ть

verb, perfective

Very rarely used word (top 30,000)

to add a small amount of liquid, usually by pouring, often casually or repeatedly.
liquids only, Emphasis: small extra amount, not filling to a desired level.

Examples

Она украдкой подлила́ ему в ко́фе капельку любо́вного зе́лья.She slipped a drop of love potion into his coffee.

Чай слишком кре́пкий. Подле́й воды.The tea is too strong. Add some water.

Imperative
ты	подле́й
вы	подле́йте

Active present	-
Active past	подли́вший	having poured in, who poured in, having added
Passive present	-
Passive past	подлитый	poured in, added (liquid)
Gerund present	-
Gerund past	подли́в подливши	while doing (past)