Disparage
Etymology
From Old French "desparagier," which originally meant to marry someone below their rank, from des- (apart, away) and "parage" (equal rank or lineage), from Latin "par" (equal). The root idea is a mismatch of worth: to disparage was first to degrade by an unequal match, then more generally to treat as inferior and speak slightingly of.
verb · /dih-SPAR-ij/
To belittle someone or something, or to represent them as of little worth.
What it names
A precise verb for the quieter form of attack — chipping at another’s standing by implication rather than open insult.
Example
He never openly criticized rivals; he simply disparaged their work with a well-timed shrug.
Related idea
An insult is a direct, open offense; to disparage is subtler — to belittle by implication, steadily chipping at someone’s worth.