1.
wholeheartedness, single-mindedness, concentration
The state of devoting one's entire mind and energy to a single purpose, without distraction.
一心に勉強する。
To study wholeheartedly.
合格を目指して一心に努力した。
I worked single-mindedly toward passing the exam.
彼は一心不乱に本を読んでいた。
He was reading a book with total, undivided concentration.
USAGE:
Most commonly used in the adverbial form 一心に, meaning "wholeheartedly" or "with single-minded devotion."
COMMON COLLOCATIONS:
- 一心に: wholeheartedly, with all one's heart
- 一心不乱: with complete concentration, with undivided attention
- 一心同体: of one mind and body (used for very close relationships)
NOTE:
一心不乱 is a four-character compound (四字熟語) originally from Buddhism, meaning to be so focused that nothing can disturb one's concentration.