ὑπο-βλητέος · hypo-blēteos — LSJ
to be put under, γῆ φυτῷ ὑ. X. Oec. 19.9.
ὑποβλητέον one must put under, πίθῳ ἄμμον Gp. 6.2.4, cf. Sor. 2.46, Aët. 7.26; one must cause to lie in the bath, Herod.Med. ap. Orib. 10.37.14.
one must lay the foundation of, λόγον D.H. Rh. 7.4.