Definition - When consecutive, duplicate, or similar syllables are contracted to make a word easier to pronounce.

Example -
Pronouncing prob - ab - ly as prob - ly.

Etymology -
The word was coined from the Greek haplos, simple or single + ology, study of.

Oxford English Dictionary -
Its first citation is from 1895:
"The philosopher who coined symbolatry after idolatry (the latter […] changed by haplology.)
(M. Bloomfield in Amer. Jrnl. Philol. XVI. 411)

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