вызнава́ть

вы́знать

Imperfective вызнава́ть (ongoing or repeatedly)

Perfective вы́знать (completed or one-time)

Very rarely used word (top 30,000)

To fully know(вы́знать)
the prefix вы- here, indicates it's a completion.
Example: Я вызнаю как произнести эта буква. - I fully know how to pronounce this letter.

Don't use this word if you just want to say "I know", this would be more like "I fully know" "I know completely how to play this"

	imperfective	perfective
ты	вызнава́й!	вы́знай!
вы	вызнава́йте!	вы́знайте!

Active present	вызнающий		someone who is doing
Active past	вызнававший	вы́знавший	someone who was doing
Passive present	вызнаваемый		something which is being done
Passive past		вы́знанный
Gerund present	вызнавая		while doing (present)
Gerund past	вызнавав вызнававши	вы́знав вызнавши	while doing (past)