Tantamount
/ˈtæn.tə.maʊnt/noun
Equivalent in value, effect, or meaning.
Did you know?Tantamount entered English through a misread heraldic phrase, and its original force was all about equal value — the kind of linguistic alchemy where a phrase hardens into a single powerful word.
Etymological Timeline
Medieval Latin
ML
tantum ad montem
“interpreted in English as a phrase meaning 'so much to the amount' or 'to the same amount' in later folk explanation, though this is not the true origin”
Late Middle English
English
tantamount
“used as a phrase meaning equal in amount or value”
17th Century
English
tantamount
“fixed as an adjective meaning equivalent in effect or value”
Modern English
English
tantamount
“equivalent in force, effect, or significance”