Proto-Indo-European root meaning "to grasp."
It forms all or part of: accept; anticipate; anticipation; behave; behoof; behoove; cable; cacciatore; caitiff; capable; capacious; capacity; capias; capiche; capstan; caption; captious; captivate; captive; captor; capture; case (n.2) "receptacle;" catch; catchpoll; cater; chase (n.1) "a hunt;" chase (v.) "to run after, hunt;" chasse; chasseur; conceive; cop (v.) "to seize, catch;" copper (n.2) "policeman;" deceive; emancipate; except; forceps; gaffe; haft; have; hawk (n.); heave; heavy; heft; incapacity; inception; incipient; intercept; intussusception; manciple; municipal; occupy; participation; perceive; precept; prince; purchase; receive; recipe; recover; recuperate; sashay; susceptible.
It is the hypothetical source of/evidence for its existence is provided by: Sanskrit kapati "two handfuls;" Greek kaptein "to swallow, gulp down," kope "oar, handle;" Latin capax "able to hold much, broad," capistrum "halter," capere "to grasp, lay hold; be large enough for; comprehend;" Lettish kampiu "seize;" Old Irish cacht "servant-girl," literally "captive;" Welsh caeth "captive, slave;" Gothic haban "have, hold;" Old English hæft "handle," habban "to have, hold."
"manner of acting toward or before others," c. 1600, from French déportement, from déporter "to behave," from Old French deporter (see deport (v.1)).
late 15c., "to behave," from Old French deporter "behave, deport (oneself)" (12c.), which also had a wide range of secondary meanings, such as "be patient; take one's (sexual) pleasure with; amuse, entertain; remain, delay, tarry; cheer, console, treat kindly; put aside, cast off, send away," from de "from, off" (see de-) + porter "to carry," from Latin portare "to carry," from PIE root *per- (2) "to lead, pass over." Related: Deported; deporting.
late 14c., "to bear, endure (grief, pain, etc.; sense now obsolete), from Old French comporter "endure, admit of, allow; behave" (13c.) and directly from Latin comportare "to bring together, collect," from com "with, together" (see com-) + portare "to carry" (from PIE root *per- (2) "to lead, pass over").
Meaning "to agree, accord, be suitable" (with with) is from 1580s. Meaning "to behave, conduct" (with a reflexive pronoun) is from 1610s. Related: Comported; comporting.