Glosses and translation equivalents

Sometimes, a single word equivalent will not convey what a word means. Consider Pindar Nemean 7.65 and the note thereon in Bury's commentary:

Mr Holmes (The Nemean Odes of Pindar with special reference to
Nem. VII.) has this note on ὑπέρ: 'if ὑπέρ be really to περί what the
highest vertical point of a curve would be to the curve itself, what
preposition could more exactly describe the position of Kichyros, the city
of Thesprotia, here supposed to be mentioned?

'What preposition...?' indeed!