beadyoudaoicibaDictYouDict[bead 词源字典]
bead: [13] The word bead originally meant ‘prayer’. It comes ultimately from Germanic *beth-, source also of English bid. This passed into Old English as gebed, which by the 13th century had lost its prefix to become bede. (German has the parallel gebet ‘prayer’.) The modern sense ‘small pierced decorative ball’ developed in the 14th century, from the use of a string of rosary beads for counting while saying one’s prayers.
=> bid[bead etymology, bead origin, 英语词源]
bead (n.)youdaoicibaDictYouDict
mid-14c., bede "prayer bead," from Old English gebed "prayer," with intensive or collective prefix *ge- + Proto-Germanic *bidam "entreaty" (cognates: Middle Dutch bede, Old High German beta, German bitte, Gothic bida "prayer, request"), from PIE *gwhedh- "to ask, pray."

Shift in meaning came via beads threaded on a string to count prayers, and in phrases like to bid one's beads, to count one's beads. German cognate Bitte is the usual word for conversational request "please." Also related to bid (Old English biddan) and Gothic bidjan "to ask, pray." Sense transferred to "drop of liquid" 1590s; to "small knob forming front sight of a gun" 1831 (Kentucky slang); hence draw a bead on "take aim at," 1841, U.S. colloquial.
bead (v.)youdaoicibaDictYouDict
1570s, "to adorn with beads," from bead (n.). Meaning "to string like beads" is from 1883. Related: Beaded; beading.