vain > weak, foolish; or, since their bodies are made of air: unavailing, insubstantial
102.4
Forthwith he runnes with feigned faithfull hast
2 Vnto his guest, who after troublous sights
And dreames, gan now to take more sound repast,
4 Whom suddenly he wakes with fearefull frights,
As one aghast with feends or damned sprights,
6 And to him cals, Rise rise vnhappy Swaine,
That here wex old in sleepe, whiles wicked wights
8 Haue knit themselues in Venus shamefull chaine;
Come see, where your false Lady doth her honour staine.
1 Forthwith he runs with feigned faithful haste 2 To his guest, who, after troublous sights 3 And dreams, began now to take more sound repast;
repast > refreshment; repose
4 Whom suddenly he wakes with fearful frights, 5 As one aghast with fiends or damned sprites,
aghast > terrified (especially with superstitious fear)
6 And to him calls, "Rise, rise, unhappy swain,
swain > young man
7 That here wax old in sleep, while wicked wights