That scroll which warned thee to demand a champion, from whom couldst thou think it came, if not from Bois-Guilbert?
But, tell me, how couldst thou thus get into her confidence?
couldst thou, the latest solace of mine age, leave me alone so cruelly?
If thou canst not trust His priests, couldst thou not trust Him?
Nay—if I know it, I may tell thee no more, thou who couldst not hear what the drums said to me but now.
The Master said, Feeding on rice, clad in brocade, couldst thou be at rest?
But how couldst thou receive God into thy body, if it were in thy esteem an organ unworthy of God?
couldst thou identify these knaves, if once they were apprehended?
Even if thou stoodest before me thou wouldst not know me, and couldst but do what I bid thee.
couldst thou but 'a' seen her when she was returned an hour after!
Old English 1st & 3rd person singular present indicative of cunnan "know, have power to, be able," (also "to have carnal knowledge"), from Proto-Germanic *kunnan "to be mentally able, to have learned" (cf. Old Norse kenna "to know, make known," Old Frisian kanna "to recognize, admit," German kennen "to know," Gothic kannjan "to make known"), from PIE root *gno- (see know).
Absorbing the third sense of "to know," that of "to know how to do something" (in addition to "to know as a fact" and "to be acquainted with" something or someone). An Old English preterite-present verb, its original past participle, couth, survived only in its negation (see uncouth), but cf. could. The present participle has spun off as cunning.
Old English canne "a cup, container," from Proto-Germanic *kanna (cf. Old Saxon, Old Norse, Swedish kanna, Middle Dutch kanne, Dutch kan, Old High German channa, German Kanne). Probably an early borrowing from Late Latin canna "container, vessel," from Latin canna "reed," also "reed pipe, small boat;" but the sense evolution is difficult.
Modern "air-tight vessel of tinned iron" is from 1867 (can-opener is from 1877). Slang meaning "toilet" is c.1900, said to be a shortening of piss-can. Meaning "buttocks" is from c.1910.