"In" is an English equivalent of the French word "en."
Specifically, the French word is a preposition. It includes among its meanings "in, into, to." The pronunciation is "aw."
in
en francais (in french): imbécile in english : idiot
To describe your state or situation. For e.g I am on vacation would be 'Je suis en vacances' ou en conges (where the e is accented)
"un arc-en-ciel" - pl. "des arcs-en-ciels"
en voiture means 'in (the) car' in French.
Comment dit-on en français? in French is "How does one say in French?" in English.
Un film en anglais in French means "a film in English" in English.
"fabriqué" made in England = "fabriqué en Angleterre"
En garde in French means "on (your) guard (because I am about to attack, in fencing)" in English.
En ré mineur in French means "in D minor" in English.
Travaillez en paires in French means "Work in pairs!" in English.
"On guard!" in English is en garde! in French.