Middle English: from Old French, via Latin from Greek prou(m)non 'plum'
late 15th cent. (in the sense 'abbreviate'): from Old French pro(o)ignier, possibly based on Latin rotundus 'round'
You have to prune a bush if you want fruit...
There is no best way to prune.
Apples, pears and cherries can be pruned back when they've lost their leaves.
Firms are cutting investment and pruning their product ranges.
The company has pruned back its workforce by 20,000 since 1989.