#407. [Repeated and protracted sounds.] Roll. -- N. roll &c. v.; drumming &c. v.; berloque[obs], bombination[obs], rumbling; tattoo, drumroll; dingdong; tantara[obs]; rataplan[obs]; whirr; ratatat, ratatat- tat; rubadub; pitapat; quaver, clutter, charivari[obs], racket; cuckoo; repetition &c. 104; peal of bells, devil's tattoo; reverberation &c. 408.
[sound of railroad train rolling on rails] clickety-clack.
[animals that hum] hummingbird.
[animals that purr] cat, kitten (animal sounds) 412.
V. roll, drum, rumble, rattle, clatter, patter, clack; bombinate[obs].
hum, trill, shake; chime, peal, toll; tick, beat.
drum in the ear, din in the ear.
Adj. rolling &c. v.; monotonous &c. (repeated) 104; like a bee in a bottle. <-- resonance here covers 3 sound qualities; echo, low note, and ringing. They should be separated. The physical science meanings must also be listed separately -->