sifter

The word 'sifter' is a transparent English compound built from the native verb 'sift' and the agentive suffix '-er'. The verb 'sift' itself has deep Germanic roots, descending from the Old English siftan, which is related to the act of passing material through a sieve. This Old English term is further connected to a wider Proto-Germanic family of words concerning sieving and filtering. The straightforward addition of '-er' creates a noun that logically denotes an instrument or agent performing the action of separating fine particles from coarse ones, a meaning that has remained consistent from its concrete kitchen-tool sense to its more metaphorical application describing a careful examiner.

Structure: sift (to separate) + er (agent suffix) - sift: From Old English siftan, meaning 'to pass through a sieve'. Its functional role is the core verb root. - er: An agent noun suffix of Old English origin, used to form nouns denoting a person or thing that performs the action of the verb.