逸れる
それる · soreru · JLPT N2 · verb-ichidan
to stray from subject
逸 (itsu) = escape + れる (reru) = to be carried off; the word means to slip away from the target, like a shot that drifts off course.
逸 means escape or stray, and the れる ending marks the intransitive sense of being carried off course. Use it for a ball that veers off-line or a conversation that drifts from its topic.