farfelu

The etymology of this word remains highly contested; it may be related to 'berlue', which itself suggests a Celtic root 'belo', meaning sparkling, and a Gascon root 'belet', meaning lightning. If the word 'berlue' is the origin of 'farfelu', one can see a connection with light (sparkling, lightning) confirmed by the suffix 'lu', a prefix in words like 'lumière' (light), 'luciole' (firefly), 'lucide' (lucid).