Disreputable or sordid in a rakish or appealing way.
Originating from early 19th century French, louche literally translates to squinting.
“Fresh of face and louche of manner, they are equal parts Dickensian urchins and Wildean dandies.”
“Louche he may be but I am able to resist his charms and see him for what he is.”
Pompous or extravagant in language, style, or manner, especially in a way that is intended to impress.
Late 16th century: from Latin grandiloquus, literally ‘grand-speaking’, from grandis ‘grand’ + loqui ‘speak’. The ending was altered in English by association with eloquent.