very close and intimate friends
非常に親しくて親密な友達 (hijō ni shitashikute shinmitsu na tomodachi)
"They have been bosom friends since childhood."
"彼らは子供の頃から非常に親しい友達です。" (Karera wa kodomo no koro kara hijō ni shitashī tomodachi desu.)
to listen to someone until they have finished speaking
to finish or conclude something
to lead by example, taking the initiative
to stay mentally focused and motivated
to control or limit something
to support opposing parties to gain advantage
