i Register
In some senses, fu is marked as informal, vulgar. Watch for register when choosing this word.
ADJ.
good, modern, needed, right
VERB + FU
continued, face, know, knows, learn, learning, loves, master
FU + NOUN
county, fighters, flicks, judo, jujutsu, lessons, manchu, practitioner
PREP.
about
ADV.
already, everywhere