n.: apply [give, set, bend] one's mind to, engrossed, hard work, concentrated effort, devoted to sth. wholeheartedly, concentrate one's attention, be absorbed, have [keep, put, set] one's mind on [upon] sth., give one's (whole) mind to, absorption, soak oneself in, with deep concentration, immersion, devotion, concentration, attention, application
v.: concentrate, apply one's mind steadily, give careful thought
adj.: occupied in doing sth with great concentration