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thought

/θɔt/

A mental process, idea, or considered judgment

From Proto-Indo-European teng (to think).

noun
verb
teng
Proto-Indo-European
Verified
*teng-
reconstructed
“to think”; reconstructed ancestor

from Proto-Indo-European *teng- (“to think”). Cognate with Scots thocht (“thought”), Saterland Frisian Toacht...

Proto-Germanic
Verified
*þanhtaz
reconstructed
“thought”; sound changes produced the Germanic consonant cluster

from Proto-Germanic *þanhtaz, *gaþanhtą (“thought”)

Old English
Verified
þōht
“thought, thinking, compassion”; the nasal was lost before the fricative

from Old English þōht, ġeþōht

Middle English
Verified
thought
The modern-looking form develops from Old English þōht

from Middle English thought, ithoȝt

Modern English
thought

Long before anyone had a “thought,” speakers of Proto-Indo-European used *teng- for the act of thinking. In Germanic, that mental activity acquired a rougher shape: *þanhtaz, which became Old English þōht, with the nasal disappearing before the harsh fricative—a tiny pronunciation shortcut preserved in the word’s strange spelling. The family resemblance survives in think and thank, a surprising pairing: one is mental consideration, the other perhaps reflects the old connection between thinking and expressing gratitude. By the Middle English period, thought had settled into its familiar form, meaning both the activity in the mind and the idea produced by it. So when a thought suddenly arrives, it carries an ancient linguistic fossil: a prehistoric verb for thinking, squeezed through centuries of Germanic sound change.

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