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Monotone

/ˈmɑnətoʊn/noun

Speech or sound held at one unchanging pitch.

The Greek roots

μόνος
mónos
single, alone
+
τόνος
tónos
pitch, tension

Literally: single tone

The story of the word

τόνος is a stretching, from τείνω, to stretch, so pitch in Greek is literally how tight the string is. μονότονος described a voice that never moved off one note, and English took the word in the seventeenth century before widening it to any grinding sameness. Mathematics kept the strict sense: a monotonic function only ever goes one way, and the hypotenuse is from the same τείνω, the side stretching under the right angle.

How it travelled
Ancient Greek → Latin → English
First recorded
17th century

Same family

tonemonotonousmonologuehypotenuse

In a sentence

He read the safety announcement in a monotone that made everyone stop listening by the second line.

Built on the same root

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