constipation (n.) Look up constipation at Dictionary.com
c.1400, "constriction of tissue," from Late Latin constipationem (nominative constipatio), noun of state from Latin constipare "to press or crowd together," from com- "together" (see com-) + stipare "to cram, pack" (see stiff (adj.)). Specifically of the bowel condition since 1540s.