sire, good belt, gentleman
紳 centers on a gentleman's formal sash or belt, and by extension the refined, dignified person who wears it.
紳 combines 糸 (thread) with 申, which likely contributes the sound and may suggest extending or stretching, as a long sash worn by gentlemen.
The thread radical 糸 beside 申 suggests a long, formal sash made of fine thread, the kind a gentleman would wear.
For シン, picture a gentleman adjusting his sash with a sharp, crisp motion: shin! The sound shin cues シン while the sash is pulled straight.
—
gentleman
country gentleman
country gentleman (esp. one that's slightly unrefined); squire
wealthy merchant
gentlemen's agreement
suits for gentlemen; menswear
ladies and gentlemen
for men; male-
haberdasher
gentlemanly; well-mannered; well-bred; gentlemanlike
who's who; directory; social register
men's shoes
gentlemanly; gentlemanlike; in the manner of a gentleman
person of rank; person of status; ranked official
old gentleman; elderly gentleman
noble; men of rank; notables
gentlemen of (high) eminence; notables; dignitaries