mìjué, [秘訣], secret know-how/key (to longevity)/secret (of happiness)/recipe (for success)诀窍
juéqiào, [訣竅], secret/trick/knack/key诀别
juébié, [訣別], to bid farewell/to part (usually with little hope of meeting again)诀
jué, [訣], to bid farewell/tricks of the trade/pithy mnemonic formula (e.g. Mao Zedong's 16...口诀
kǒujué, [口訣], mnemonic chant/rhyme for remembering (arithmetic tables, character stroke order ...