Gnomish
ogra
preposition. able to
ogra-
verb. to be able, can
og-
verb. to be able, can
odra-
verb. am able, can
There are more words but they are from Tolkien's earlier conceptional periods. Tolkien likely changed these words as he evolved the aesthetics and completeness of the languages. You may even find languages that Tolkien later rejected. Do not mix words from different time periods unless you are familiar with the phonetic developments.
Below: Tolkien's Late Period (1950–1973). These are from Tolkien's late conceptual period — his most settled forms of the languages. Prefer these over the earlier ones above when composing new text.
A verb appearing in the Gnomish Lexicon of the 1910s as G. og- “am able, can” with variant ogra-, along with adjective forms G. ogra “able” and G. ogriol “possible” (GL/62). It had an associated noun form G. ogor “might, power; ability” so it was probably originally based on physical ability.
Neo-Sindarin: For purposes of Neo-Sindarin, I would use ᴺS. pol- for “to be (physically) able”; see that entry for discussion.