pruner

The word 'pruner' is a transparent English compound. Its core, 'prune', entered English from Old French, where it originally meant 'to trim (a vine) by rounding off'. This French term can be traced back to the Latin rotundare, meaning 'to make round', reflecting the early horticultural practice of shaping plants. The agent suffix '-er', of Germanic origin, is one of the most productive in English, attached to verbs to denote 'one who performs an action'. Thus, a 'pruner' literally means 'one who cuts (specifically to trim and shape plants)', a meaning that has remained consistent from its tools and practitioners.

Structure: prune (to cut) + er (agent suffix) 'prune' (from Old French proignier, ultimately from Latin rotundare, 'to make round'); 'er' (agent noun suffix from Old English -ere, from Proto-Germanic).