adj. Equivalent in effect or value: a request tantamount to a demand. [From obsolete tantamount, an equivalent, from Anglo-Norman tant amunter, to amount to as much : tant, so much, so great (from Latin tantum, neuter of tantus, from tam, so; see to- in the Appendix of Indo-European roots) + amunter, to amount to, variant of Old French amonter; see AMOUNT.] |
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