late 14c., resownen, resounen, of a place, "re-echo, sound back, return an echo; reverberate with," from Anglo-French resuner, Old French resoner "reverberate" (12c., Modern French résonner), from Latin resonare "sound again, resound, echo" (source also of Spanish resonar, Italian risonare), from re- "back, again" (see re-) + sonare "to sound, make a noise" (from PIE root *swen- "to sound").
early 14c., "alphabetic element other than a vowel," from Latin consonantem (nominative consonans) "sounding together, agreeing," as a noun, "a consonant" (consonantem littera), present participle of consonare "to sound together, sound aloud," from assimilated form of com "with, together" (see con-) + sonare "to sound, make a noise" (from PIE root *swen- "to sound").
Consonants were thought of as sounds that are produced only together with vowels. Related: Consonantal.
c. 1500, "rapid succession of short, sharp sounds," from rattle (v.). As a child's toy or other instrument contrived to make a rattling sound, from 1510s. As a sound made in the throat (especially of one near death) from 1752.
The watchman's rattle, formerly used for giving an alarm, and the child's toy resembling it, consist of a vibrating tongue slipping over the teeth of a rotating ratchet-wheel, and producing much noise when rapidly twirled by the handle. [Century Dictionary]
"soft food for infants, gruel, porridge," late 14c., from Old French pape "watered gruel" and Medieval Latin papo, both from Latin pappa, a widespread word in children's language for "food" (compare Middle High German and Dutch pap, German Pappe, Spanish, Portuguese papa, Italian pappa), imitative of an infant's noise when hungry; possibly associated with pap (n.2). Meaning "over-simplified idea" first recorded 1540s.
1560s, "to bulge out;" 1610s, "to strike heavily, cause to come into violent contact," perhaps from Scandinavian, probably echoic, if the original sense was "hitting" then of "swelling from being hit." It also has a long association with the obsolete verb bum "make a booming noise." To bump into "meet by chance" is from 1886; to bump off "kill" is by 1908 in underworld slang. Related: Bumped; bumping. Bumpsy (adj.) was old slang for "drunk" (1610s).