na-adjective
disjointed; frequently interrupted; in fits and starts
Describes something that keeps breaking off or is not continuous, such as a conversation, signal, or supply. Often used with なる or だ.
山の中では携帯の電波が途切れがちになる。
In the mountains, the cell phone signal tends to be frequently interrupted.
彼の話は途切れがちで、要点がつかみにくい。
His story is disjointed, making it hard to grasp the main point.
Compound of 途切れ (continuative form of 途切れる, 'to be interrupted') + がち (suffix meaning 'tends to').