ὑποστορεννύναι
From LSJ
ξυνῆλθεν ἀτταγᾶς τε καὶ νουμήνιος → birds of a feather flock together, the francolin and the new-moon bird get together
Greek > English (Woodhouse Verbs Reversed)
spread under, stretch under, strew under (see also: ὑποστόρνυμι)