To know someone (or their name) without them knowing you.

(chiefly in the negative) To have any knowledge (about something); have a clue. / Used other than figuratively or idiomatically: see have, first, idea.

To not know anything about something.

(colloquial, idiomatic, dated) To take legal action against someone.

To not know at all. / To be mistaken; to not have a correct idea.

Used to say that you want someone to do something faster because you do not have enough time to wait for them to finish

plural of Havanna

Dated form of Havana (“type of cigar”).

plural of Havannah

(figuratively) to be part of two opposite sides.