to become involved in order to help or stop something
何かを助けるため、または何かを止めるために関与する (nanika o tasukeru tame, mata wa nanika o tomeru tame ni kan'yo suru)
"The manager will step in if the discussion gets heated."
"議論が熱くなった場合、マネージャーが介入します。" (Giron ga atsuku natta baai, manējā ga kainyū shimasu.)
to speak or perform without preparation
People or things forgotten when not visible or present.
to continue for too long and become boring
someone who appears harmless but is actually dangerous
to make a firm decision or take a strong stand on something
to remove an item from a list
