手放し
JLPT N1 · Nounてばなし(tebanashi)声调 2
not holding on; not using the hands; letting go one's hold; lack of reserve (in expressing one's emotions); lack of restraint; openly (saying)
彼は人前で息子の成功を手放しで自慢している。— He boasts openly of his son's success in front of others.