in words of one syllable Definition

syllable
noun

1. A segment of a spoken word consisting of one sound or of two or more sounds said as a single unit of speech (segment and spoken each consist of two syllables; consisting has three syllables).
2. The slightest word or sound.

Example: He hardly uttered a syllable all evening

Idiom: in words of one syllable

In simple language; frankly; plainly.

Etymology: 14c: from Greek syllabe, literally ‘something that is held or taken together'.