1. to render worthless, useless, or futile 2.to make dull or torpid 3. to make seem foolish, stupid, inconsistent, etc.; make absurd or ridiculous 4. (law) to allege to be of unsound mind and therefore not legally responsible
verb: cause one, through routine, to lose energy and enthusiasm
As an undergraduate Mark felt stultified by classes outside his area of study; only in grad school, in which he could focus solely on literary analysis, did he regain his scholarly edge.
LL stultificare < L stultus, foolish, akin to stolidus, stolid + facere, to make, , do1