目ざとい

(1)having very keen vision; "quick-sighted as a cat"

(2)非常に鋭い視力を持つさま

(3)marked by full consciousness or alertness; "worked every moment of my waking hours"

(4)十分な意識または機敏さで特徴付けられる

(5)keenly perceptive or alert; "quick-sighted into the faults of the time"- Leonard Bacon

(6)鋭く明敏か注意深い

(7)carefully observant or attentive; on the lookout for possible danger; "a policy of open-eyed awareness"; "the vigilant eye of the town watch"; "there was a watchful dignity in the room"; "a watchful parent with a toddler in tow"

(8)慎重に目を配るあるいは注意深い

(9)可能性がある危険に目を光らせている

(10)(of sleep) easily disturbed; "in a light doze"; "a light sleeper"; "a restless wakeful night"

(11)（睡眠について）すぐに中断される

(1)in a light doze

(2)軽い居眠りで

(3)a light sleeper

(4)眠りの浅い人

(5)a restless wakeful night

(6)落ち着かない眠れぬ夜