Submission
Post, Contribution, Submit
noun, する verb
Throw your draft at people to post it on their Facebook wall! Wait, that's not how it works? Hush, yes it does, just throw it harder.
とうこう
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
フェイスブックに犬の写真を投稿しました。
I posted pictures of my dog to Facebook.