The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.
Appendix I
Indo-European Roots
ENTRY:
kap-
DEFINITION:
To grasp. Derivatives include have, heavy, cable, captive, deceive, capsule, and chassis. I. Basic form *kap-.1.heddle, from Old English hefeld, thread used for weaving, heddle (a device which grasps the thread), from Germanic *haf-.2.haft, from Old English hæft, handle, from Germanic *haftjam.3. Form *kap-o-.have; behave, from Old English habban, to have, hold, from Germanic *habai-,*habn.4.heavy, from Old English hefig, heavy, from Germanic *hafigaz, containing something, having weight. 5.haven, from Old English hæfen, a haven, from Germanic *hafn-, perhaps place that holds ships. 6.hawk1, from Old English h(e)afoc, hawk, from Germanic *habukaz.7. Latin combining form -ceps (< *kap-s), taker (see gwher-, man-2, per1). 8. Probably from this root is Germanic *gaf-, the source of Provençal gafar, to seize: gaff1. II. Suffixed form *kap-yo-.1.heave, heft, from Old English hebban, to lift, from Germanic *hafjan.2.cable, cacciatore, caitiff, capable, capacious, capias, capstan, caption, captious, captivate, captive, captor, capture, catch, cater, chase1, cop2, copper2; accept, anticipate, catchpole, conceive, deceive, except, inception, incipient, intercept, intussusception, municipal, nuncupative, occupy, participate, perceive, precept, receive, recipe, recover, recuperate, susceptible, from Latin capere, to take, seize, catch. III. Lengthened-grade variant form *kp-.1a.behoof, from Old English behf, use, profit, need; b.behoove, from Old English behfian, to have need of. Both a and b from Germanic compound *bi-hf, that which binds, requirement, obligation (*bi-, intensive prefix; see ambhi), from *hf-.2.copepod, from Greek kp, oar, handle. (Pokorny kap- 527.) Compare ghabh-.