offend (v.)youdaoicibaDictYouDict
early 14c., "to sin against (someone)," from Old French ofendre "transgress, antagonize," and directly from Latin offendere "to hit, strike against," figuratively "to stumble, commit a fault, displease, trespass against, provoke," from ob "against" (see ob-) + -fendere "to strike" (found only in compounds; see defend).

Meaning "to violate (a law), to make a moral false step, to commit a crime" is from late 14c. Meaning "to wound the feelings" is from late 14c. The literal sense of "to attack, assail" is attested from late 14c.; this has been lost in Modern English, but is preserved in offense and offensive. Related: Offended; offending.
phenomenal (adj.)youdaoicibaDictYouDict
1803, "of the nature of a phenomenon," a hybrid from phenomenon + -al (1). Meaning "remarkable, exceptional" is from 1850.
[Phenomenal] is a metaphysical term with a use of its own. To divert it from this proper use to a job for which it is not needed, by making it do duty for remarkable, extraordinary, or prodigious, is a sin against the English language. [Fowler]
Related: Phenomenally.