背せい延のび
Meanings
Noun
Verb (する, intransitive)
1. standing on tiptoe and stretching one's back to make oneself taller; stretching oneself
Now alone, I stood up from the chair and stretched.
2. overreaching oneself; overstretching oneself; trying to do something beyond one's ability; pushing to the limit
But I don't think you need to force yourself to overreach.
Kanji used
back of the body
prolong
Pitch accent
せ
いのび
Composed of
height; stature
growth; development; stretching (one's body, e.g. when waking up); (ability to) spread (of paint, cream, etc.); elongation; extension