"fight against, oppose, resist," early 15c., from Latin oppugnare "to fight against, attack, assail," from assimilated form of ob "toward, against" (see ob-) + pugnare "to fight" (see pugnacious). Related: Oppugned; oppugning; oppugnancy; oppugnant; oppugnation.
oppression
oppressive
oppressor
opprobrious
opprobrium
oppugn
opry
opsigamy
opsimathy
opt
optative
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