1530s, from Late Latin inopportunus "unfitting," from in- "not" + opportunus "favorable, convenient" (see opportune). Rare or obsolete in 18c. Related: Inopportunely; inopportuneness; inopportunity.
inoculation
inoffensive
inofficious
inoperable
inoperative
inopportune
inordinate
inorganic
in-patient
input
inquest
