► 動詞凝る  [(1)こる]    
meaning:  focus  rank: 2☆ 
彼女は
花を
育てることに
凝っている ⇨ She is really into growing flowers  
(☛ Take a very keen interest in something that requires skills)凝る  [(1)こる]    
meaning:  hard  rank: 2☆ 
肩が
凝って
仕方ない ⇨ I’m struggling with my stiff shoulders, neck  
(☛ Muscles to stiffen up and cause discomfort)