(英) Would you like your steak rare, medium, or well-done?
(英) Make sure food is fully cooked before consumption.
(英) Those bananas are so unripe, they are not ripe yet.
familiar; well acquainted
(英) I know him, but I am not well acquainted with him.
(英) I'm very familiar with this area.
(英) Study chapter three by heart, it must be in the examination.
skilled; experienced; practised; seasoned
(英) Do you know about computers?
(英) I know few Japanses dialogues only, not really fluent.