And here is a saying you’ll hear often. It is generally used with reference to Gaelic. As Gaelic is feminine, we use the pronoun i (she).
Cleachd i no caill i!
Use it or lose it!
This phrase has two regular verbs: cleachd (use) and caill (lose).
As with most regular verbs, where possible, we lenite them to form the past tense.
Chleachd mi an càr an dè,
I used the car yesterday,
agus chaill mi na h iuchraichean agam.
and I lost my keys.