Translation guide
A bread knife is a serrated knife designed for slicing bread. In Japanese, it is commonly referred to using the loanword パン切りナイフ or the more native パン切り包丁.
The learner wants to refer to the kitchen tool specifically used for cutting bread.
The most common and straightforward term, combining 'bread' (パン) and 'cutting knife' (切りナイフ).
パン切りナイフでパンを切ってください。
Please cut the bread with the bread knife.
Uses 包丁 (kitchen knife) instead of ナイフ, sounding slightly more traditional or domestic.
このパン切り包丁はとてもよく切れる。
This bread knife cuts really well.
A less common direct loan from English 'bread knife'. Understandable but not the typical term.
パンナイフを買い替えたい。
I want to replace my bread knife.