"inconvenient, unseasonable, unsuitable, inappropriate, unfit," 1530s, from Late Latin inopportunus "unfitting," from in- "not" (from PIE root *ne- "not") + opportunus "favorable, convenient" (see opportune). Rare or obsolete in 18c. Related: Inopportunely; inopportuneness; inopportunity.
arrived at a most inopportune hour
an inopportune visit
inoculation
inoffensive
inofficious
inoperable
inoperative
inopportune
inordinate
inorganic
in-patient
input
inquest
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