apologetic (adj.) Look up apologetic at Dictionary.com
1640s, "vindicatory, containing a defense," from French apologétique, from Latin apologeticus, from Greek apologetikos "defensible," from apologeisthai "speak in one's defense," from apologos "an account, story," from apo "away from, off" (see apo-) + logos "speech" (see lecture (n.)). Meaning "regretfully acknowledging failure" is from 1855.