IPA: /ˈfoʊldər/
KK: /ˈfoʊldər/
A cover made of paper or plastic that is used to hold and organize loose sheets of paper.
I put all my important documents in a folder to keep them safe.
Folder → The word 'folder' originates from the verb 'to fold' (from Old English 'fealdan', meaning to fold or bend) combined with the suffix '-er' (meaning a person or thing that performs a specified action). A folder is thus an object that is used to fold or hold papers together.
Think of 'folding' papers together — that's what a 'folder' does, it holds folded documents.