専心する devote all one's energies ((to));give one's undivided attention ((to))
- 彼は一意[鋭意]専心,癌がんの原因研究に励んだ
- He 「devoted all his energies to [threw himself completely into] research on the cause of cancer.
- 私はこの仕事に専心しております
- I am putting my heart and soul into this job. ⇒せんねん(専念)