κεφαλαλγής
From LSJ
ἐγώ εἰμι τὸ φῶς τοῦ κόσμου· ὁ ἀκολουθῶν μοι οὐ μὴ περιπατήσῃ ἐν τῇ σκοτίᾳ ἀλλ' ἕξει τὸ φῶς τῆς ζωῆς → I am the light of the world; he that followeth me shall not walk in darkness but shall have the light of life (John 8:12)
English (LSJ)
ές,
A suffering from headache, Plu.2.147f, Ruf. ap. Orib.7.26.129, 143. II Act., causing headache, X.An.2.3.15, Thphr.HP8.4.6, Diph.Siph. ap. Ath.2.54a, Ph.1.390, 2.99, Plu.2.133c, Gal.17(2).818, etc. (-αλγός is a common f.l.).