/ ɪnˈɒpətjuːn; NAmE ɪnˌɑːpərˈtuːn/ adjective
( formal ) happening at a bad time
SYN inappropriate , inconvenient :
They arrived at an inopportune moment.
OPP opportune
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WORD ORIGIN
early 16th cent.: from Latin inopportunus , from in- not + opportunus , from ob- in the direction of + portus harbour, originally describing the wind driving towards the harbour, hence seasonable.