condone (v.)

"act of pardoning a wrong act," 1620s, from Latin condonationem (nominative condonatio) "a giving away," noun of action from past-participle stem of condonare "to give up, remit, permit," from assimilated form of com-, here perhaps an intensive prefix (see con-), + donare "give as a gift" (from donum "gift," from PIE root *do- "to give").

Condonation is the remission of a matrimonial offence known to the remitting party to have been committed by the other; on the condition subsequent that ever afterward the party remitting shall be treated by the other with conjugal kindness. [Joel Prentiss Bishop, "Commentaries on the Law of Marriage and Divorce," 1864]

word-forming element meaning "together, with," sometimes merely intensive; it is the form of com- used in Latin before consonants except -b-, -p-, -l-, -m-, or -r-. In native English formations (such as costar), co- tends to be used where Latin would use con-.

*dō-, Proto-Indo-European root meaning "to give."

It forms all or part of: add; anecdote; antidote; betray; condone; dacha; dado; data; date (n.1) "time;" dative; deodand; die (n.); donation; donative; donor; Dorian; Dorothy; dose; dowager; dower; dowry; edition; endow; Eudora; fedora; Isidore; mandate; Pandora; pardon; perdition; Polydorus; render; rent (n.1) "payment for use of property;" sacerdotal; samizdat; surrender; Theodore; Theodosia; tradition; traitor; treason; vend.

It is the hypothetical source of/evidence for its existence is provided by: Sanskrit dadati "gives," danam "offering, present;" Old Persian dadatuv "let him give;" Greek didomi, didonai, "to give, offer," dōron "gift;" Latin dare "to give, grant, offer," donum "gift;" Armenian tam "to give;" Old Church Slavonic dati "give," dani "tribute;" Lithuanian duoti "to give," duonis "gift;" Old Irish dan "gift, endowment, talent," Welsh dawn "gift."