'delighter' derives from the noun 'delight', which comes from Old French 'delit' and ultimately from Latin 'delectare', where 'delectare' meant 'to please' or 'to give pleasure'.

'delectare' in Latin passed into Old French as 'delit' and into Middle English as 'delit'/'delight'; the agentive form developed in English as 'delighter' to denote a person or thing that delights.

Originally rooted in the verb sense 'to please' (Latin 'delectare'), the word evolved into nouns like 'delight' (pleasure) and eventually into the agent noun 'delighter' meaning 'one that gives pleasure'.