verb (used with object), am·or·tized, am·or·tiz·ing.
- to liquidate or extinguish (a mortgage, debt, or other obligation), especially by periodic payments to the creditor or to a sinking fund.
- to write off a cost of (an asset) gradually.
Origin of amortize
Word Origin for amortize
late 14c., from Old French amortiss-, present participle stem of amortir "deaden," from Vulgar Latin *admortire "to extinguish," from ad- "to" (see ad-) + mortus "dead," from Latin mors "death" (see mortal (adj.)). Originally a legal term for an act of alienating lands. Meaning "extinguish a debt" (in form amortization) is attested from 1824. Related: Amortized; amortizing.