[...] the case of English symbolic words; in these we can distinguish, with varying degrees of clearness, and with doubtful cases on the border-line, a system of initial and final 'root-forming morphemes' of vague signification. It is plain that the intense, symbolic connotation is associated with this structure. Thus we find recurrent initials: [ fl ] 'moving light': flash, flare, flame, flicker, flimmer. [...] In the same vague way, we can distinguish finals: [sh] 'violent movement': bash, clash, crash, dash, flash,gash, mash, gnash, slash, splash.
- Bloomfield (1935), Pag. 244-245