prim
Concise Oxford English Dictionary © 2008 Oxford University Press:
prim/prɪm/
▶adjective (primmer, primmest) feeling or showing disapproval of anything improper; stiffly correct. ▶verb (prims, primming, primmed) purse (the mouth or lips) into a prim expression.
– derivatives
primly adverb,
primness noun.
primly adverb,
primness noun.
– origin C17 (as v.): prob. ult. from OFr. prin, Provençal prim ‘excellent, delicate’, from L. primus ‘first’.
'prim' also found in these Oxford entries:

