IPA: /ˈriːmə/
KK: /ˈrimər/
A tool used to extract juice from citrus fruits or to enlarge and shape holes in materials.
She used a reamer to make the hole larger for the pipe fitting.
Reamer → The word 'reamer' comes from the verb 'ream' (from Middle English 'remen', meaning to enlarge a hole) combined with the suffix '-er' (meaning a person or thing that performs an action). A reamer is a tool that enlarges holes, hence it is a device that performs the action of reaming.
Think of a tool that 'enlarges' holes — 'ream' means to enlarge, and '-er' indicates it is a tool that performs that action.