à la mort
/ˌa la ˈmɔː/(also alamort)
adverb
To (the) death; mortally, fatally. Also hyperbolically. Compare amort. Now somewhat rare.
Origin
Mid 16th century; earliest use found in Robert Copland (fl. 1505–1547), translator and printer. From Middle French, French à la mort desperate, to (the) death from à la + mort.