From Wiktionary, the free dictionary
lean air (present participle leantainn air or leantail air)
- continue, go on, carry on, keep on, persist, persevere
- Feumaidh mi leantainn orm le mo sgrìobhadh. - I must continue with my writing.
- Bha i sgìth ach lean i oirre. - She was tired but she persevered.
