ἀλγ-ίων · alg-iōn — LSJ
more or most painful, grievous, or distressing: — of Comp., Hom. has only neut. ἄλγιον, in signf. so much the worse, τῷ δʼ ἄλγιον, αἴ κʼ ἐθέλῃσιν . . ἄμμι μάχεσθαι Il. 18.278, cf. 306, Od. 4.292: Sup. only in Il. 23.655 ἥτʼ ἀλγίστη δαμάσασθαι (of a mule).— Both are common in Trag., as ἀλγίων A. Pr. 934, S. Ant. 64; ἄλγιστος Id. OT 675, etc. [-ῐον Hom., -ῑον Trag.]