► 副詞一々  [(2)いちいち]  [coll]    
meaning:  every  rank: 2☆ あいつは
何につけても一々
文句を
言う ⇨ He complains about every single thing
一々  [(2)いちいち]  [coll]    
meaning:  one by one  rank: 2☆ 
全部を一々調べている
時間はない ⇨ We don’t have time to check all of them one by one  
(☛ Usually implies annoyance as in “every damn thing, time”)