To try every possible way to achieve something.
何かを達成するためにあらゆる方法を試す。 (Nanika o tassei suru tame ni arayuru hōhō o tamesu.)
"The detective left no stone unturned to find the truth."
"探偵は真実を見つけるためにあらゆる手段を尽くした。" (Tantei wa shinjitsu o mitsukeru tame ni **left no stone unturned**.)
to connect or become involved in something, usually a system...
To become an important news story
someone very experienced at something
to monitor someone or something closely
to easily understand someone's thoughts and intentions
to feel very happy and excited