δεῖσθαι
From LSJ
ἑτέρως ἠδύνατο βέλτιον ἢ ὡς νῦν ἔχει κατεσκευάσθαι → otherwise they could have been constructed better than they are now (Galen, On the use of parts of the body 4.143.1 Kühn)
Greek > English (Woodhouse Verbs Reversed)
(see also δέω): beg, demand, entreat, need, require, be lacking in, crave a thing of a person, do without be lacking in, have need of, request, ask as a request, ask to do a thing, entreat something of a person