(cryptography) secret key

secret police

secret base (of the military, of children, etc.)

secret society

work done for free, unpaid work, uncompensated work / work done in vain, work with no favorable end result

to work for free, to work without pay or other compensation / to work in vain, to work with no favorable end result

(archaic, grammar) any word that declines or conjugates / (archaic, grammar) more specifically, a verb

a man with the sensitive feelings of a girl / (derogatory) a girly boy

面梟: a barn owl

ramen topped with char siu