While 'pleasant' is a neutral, all-purpose word for anything that gives mild satisfaction ('a pleasant afternoon'), 'delightful' is stronger and suggests a more vivid, memorable happiness. 'Lovely' is warmer and more informal, common in British speech ('what a lovely gift!'). 'Charming' adds a layer of personal appeal or charisma, often used for people, places, or manners ('a charming little village'). 'Enjoyable' stays focused on the activity or experience itself ('an enjoyable concert') rather than describing an inherent quality. Use 'delightful' when you want to convey that something actively filled you with happiness — for example, 'the children's concert was delightful, with everyone clapping along.'
Formed from 'delight' (a feeling of great pleasure) plus the suffix '-ful', which means 'full of'. The noun 'delight' comes from Old French 'delit', meaning pleasure, which traces back to Latin 'delectare' — to charm or please.