From chalaph; a (sacrificial) knife (as gliding through the flesh) -- knife.
see HEBREW chalaph
H4252. machalaph
[מַחֲלָף] noun masculine knife, so ᵑ9 (compare Syriac totondit (in Lexicon), , , knife, Talmud חליפות knives, according to Levy, Jastr; Thes as passing through (compare verb 3a)); but √ and meaning not certain, only Plural מַחֲלָפִים Ezra 1:9, among temple utensils (see BeRy Ryle).