Adverb
In a trim manner; nicely.
Source: Webster's dictionaryThe commonplace needs no defence, Dullness is in the critic's eyes, Without a licence life evolves From some dim phase its own surprise; Under these yellow-twinkling elms, Behind these hedges trimly shorn, As in a stable once, so here It may be born, it may be born. William Plomer
he was trimly attired Source: Internet