最後通牒

ultimatum

variant of 最[zui4]

old variant of 最[zui4]

most / the most / -est (superlative suffix)

final / last / finally / ultimate

back / behind / rear / afterwards / after / later / post-

to go through / to know well / (suffix) expert / to connect / to communicate / open / to clear / classifier for letters, telegrams, phone calls etc

classifier for an activity, taken in its entirety (tirade of abuse, stint of music playing, bout of drinking etc)

diplomatic note

(official) document / dispatch