δέω2
I.to lack, miss, stand in need of a person or thing, c. gen., Il., Xen.:— πολλοῦ δέω I want much, i. e. am far from, c. inf., πολλοῦ δέω ἀπολογεῖσθαι I am far from defending myself, Plat.; μικροῦ ἔδεον εἶναι Xen.; and absol., πολλοῦ γε δέω far from it, Plat.; τοῦ παντὸς δέω Aesch.; v. δεῖ II:—so in partic., δυοῖν δέοντα τεσσεράκοντα forty lacking two, thirty-eight, Hdt.; ἑνὸς δέον εἰκοστὸν ἔτος the 20th year save one, the 19th, Thuc.
1.to be in want or need, κάρτα δεόμενος Hdt.:— to stand in need of a person or thing, c. gen., id=Hdt., Soph.; οὐδὲν δέομαί τινος I have no need of him, Thuc.: c. inf., τοῦτο ἔτι δέομαι μαθεῖν Plat.
2.to ask for a thing from a person, c. dupl. gen. rei et pers., Hdt., Thuc.; also, τοῦτο δέομαι ὑμῶν Plat.; and c. acc. cogn., δέημα or δέησιν δεῖσθαί τινος Ar., etc., rarely with gen. pers. only, δεηθεὶς ὑμῶν having begged a favour of you, Dem.:—c. gen. pers. et inf. to beg a person to do, Hdt., Plat.
The aeolic form δεύω (v. δεύω2) shows that the root of this word was ΔΕϜ.