Trill

A trill is a little sound perk, a nice musical benefit package. It's like "phrininininING!" or "ThununununA!"

"Phdririririrⁱrⁱrⁱring!"

Trills brighten up conversations unweirdly. "Ho_ww_ww_ww a_rr_rr_rre yo_oo_oo_oo_oo_ou?"

"In England, the trill was referred to as shake from the 16th till the 19th Century" (Wikipedia). What made them stop? Presumably trill pulled off some kind of lexicographic coup.

Shake. /\/\/\/\/\/\/\/\/\/\