SHUD'DER, verb intransitive [This word contains the same elements as the Latin quatio.] To quake; to tremble or shake with fear, horror or aversion; to shiver. I love-alas! I shudder at the name. Smith. SHUD'DER, noun A tremor; a shaking with fear or horror.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI