Endless; boundless; having no end or limit (used to say there's no point continuing because it won't stop).
文句を言い始めたらきりがないから、やめよう。
If we start complaining, it will be endless, so let's stop.
割引の店を探してもきりがないので、条件を絞ろう。
Searching for discount stores is endless, so let's narrow the criteria.
詳しく説明するときりがないので要点だけ話します。
There's no end to explaining the details, so I'll only cover the main points.
Never-ending; going on forever (used to indicate something continues without stopping, often in phrases like 'even if... there's no end').
議論してもきりがないので結論を出そう。
Discussion would go on forever, so let's make a decision.
問題は山ほどあり、きりがない。
There are tons of problems; it's endless.