This is the 112th most frequent Japanese word.
好き
"Liked; beloved; pleasing; favorite."
好き is used with the auxiliary 'らしい' to indicate an assumption about someone's preference.
彼は音楽が好きらしい。
He seems to like music.
好き is used to express preference or liking for something.
私はりんごが好きです。
I like apples.
好き is used directly to express affection for someone, combining with the verb 言う to form a complex thought.