θεμελιακός
From LSJ
ἀσκεῖν περὶ τὰ νοσήματα δύο, ὠφελεῖν ἢ μὴ βλάπτειν → strive, with regard to diseases, for two things — to do good, or to do no harm | as to diseases, make a habit of two things — to help, or at least, to do no harm
English (LSJ)
ή, όν,
A of or for the foundation, Sch.Lyc.615.
Greek (Liddell-Scott)
θεμελιακός: -ή, -όν, ἀνήκων ἢ ἁρμόζων εἰς θεμέλιον, Σχόλ. Λυκ. 715.