Literally, went away (ἀπό). Leaving his son for the time.
Heal (ἰάσηται)
See on Mat 8:7, and see on Luk 6:19.
At the point of death (ἤμελλεν ἀποθνήσκειν)
Literally, was about to die. Compare Mark's uncouth phrase, ἐσχάτως ἔχει, lieth at the point of death, Mar 5:23, on which see note. Compare also Joh 12:33.