► 形容詞覚束無い  [おぼつかない]    
meaning:  control  rank: 4☆ 
彼は
酔って
足元が覚束無い ⇨ He is so drunk that his feet are wobbly
覚束無い  [おぼつかない]    
meaning:  likely  rank: 4☆ この
調子では
優勝などとても覚束ない ⇨ With this performance there is no way they can win championship  
(☛ A desirable outcome is highly unlikely)