ἀνθρακοθήκη
From LSJ
ἑὰν δὲ προσποιούμενος ᾗ τὰ μαθήματά πως ἀπείρως προβάλλων, οὐκ ἔστιν αἰτίας ἔξω → But should one profess knowledge as he puts forward something in an inexperienced way, he is not without blame (Pappus 3.1.30.31f.)
English (LSJ)
ἡ,
A coal-cellar, Gloss.
Greek (Liddell-Scott)
ἀνθρᾰκοθήκη: ἡ, ἀποθήκη ἀνθράκων, «καρβουνοθήκη» Γλωσσ.