Scio ut: ops, ops, opem, opis, opi, ope = potentia, potestas
et
opes, opes, opes, opum, opibus, opibus (f): = dīvitiae;
Orberg dicit ut gen. abl.: opis, ope = auxilium
Nonne verus est?
‘Help’ is certainly one of the word’s meanings. If Orberg is suggesting that it’s so in the genitive and ablative, above the other cases, I’d be curious to know on what basis he does so.
This may not be helpful, but here’s a funny little thing from one of Cicero’s letters to Atticus, in which he notes a small, but significant, difference in what Caesar is now requesting from him:
a. d. VI K. Caesarem Sinuessae mensurum nuntiabant. ab eo mihi litterae redditae sunt a. d. VII K. quibus iam ‘opes’ meas, non ut superioribus litteris ‘opem’ exspectat.
Thanks very much