il

1. he (third-person singular masculine subject pronoun for human subject)
2. it (third-person singular subject pronoun for grammatically masculine objects)
3. Impersonal subject; it

devient

third-person singular present indicative of devenir

rapidement

speedily; quickly

un

• Article

  an, a

• Num
• Pron
• Noun

compositeur

1. composer
2. typesetter

prolifique

1. prolific (fertile, producing offspring or fruit in great abundance)
2. prolific (capable of producing a lot of work)