idée fixe
“fixed idea” obsession; in music, a leitmotiv
il est
it is
il faut
it’s necessary
il y a
there is, there are
il y a quelque chose qui cloche
something’s amiss
impasse
dead-end, cul-de-sac, deadlock; stand-off, log jam, standstill, impasse, finesse, close, enclosed area
insouciant/e
a nonchalant man/woman; adj. carefree, careless; casual, unconcerned; reckless, unheeding, remiss, slapdash; happy-go-lucky; devil-may-care
ingénu/e
an innocent young man/woman, used particularly in reference to a theatrical stock character who is entirely virginal and wholesome. L’Ingénu is a famous novella written by Voltaire.