to take on someone's role or responsibility
誰かの役割や責任を引き受ける (dareka no yakuwari ya sekinin o hikiukeru)
"She was able to step into her boss's shoes when he was on vacation."
"彼女は上司が休暇中に上司の立場に立つことができた。" (Kanojo wa joushi ga kyūka-chū ni **joushi no tachiba ni tatsu** koto ga dekita.)
to stop doing something bad or addictive
to look very happy and cheerful
to be extremely excited or surprised
in trouble or difficulty
to develop romantic feelings for someone
to assert authority and dictate how things should be done
