ἀσύγκλαστος
From LSJ
Φιλοκαλοῦμέν τε γὰρ μετ' εὐτελείας καὶ φιλοσοφοῦμεν ἄνευ μαλακίας → Our love of what is beautiful does not lead to extravagance; our love of the things of the mind does not makes us soft.
English (LSJ)
ον,
A hard, pitiless, πρὸς τοὺς ὁμοφύλους Phld.Herc. 1251.20.