concernirse - care (v)
complicarse - hamper
curiosear - snuffle, sniff, sniffle
comportarse - behave
cercenar - circumcise
cabacear - nod
concurrir - participate, forgather
cohabitar - cohabit
confutar - disprove, refute
coercer - coerce
conjurar - adjure, attest
comisionar - assign, instruct
cmargar - acerbate, embitter
consolidar - assure
corretear - scamper
