écrirai

/e.kʁi.ʁe/écrire
1.
verbInd3rdFutSing1

will write

will send a message / will write to (someone) (including text/email)

Je t'écrirai dès que j'arrive à la gare.

I'll write to you as soon as I get to the station.

Synonyms:rédiger, envoyer un message, noter