This is the 9758th most frequent French word.
envoyant
"Envoyant" means "sending" in English.
Here, 'envoyant' functions as a present participle, describing the action of 'seeing' while relating to the speaker's experience.
Envoyant les enfants jouer au parc, je me suis rappelé mes souvenirs d'enfance.
Seeing the children play at the park, I recalled my childhood memories.
Here, 'envoyant' operates as a gerund, denoting the means or manner in which the action 'sending' occurs.
En leur envoyant le courrier aujourd'hui, j'espère qu'ils le recevront demain.
By sending them the mail today, I hope they will receive it tomorrow.
In this usage, 'envoyant' also acts as part of a gerundial phrase, specifying the method of transmission of the letter.