to keep communicating regularly with someone
誰かと定期的にコミュニケーションを取る (dareka to teikiteki ni komyunikeeshon wo toru)
"I stay in touch with my college friends through video calls."
"私は大学の友達とビデオ通話を通じてstay in touch withしています。" (Watashi wa daigaku no tomodachi to bideo tsu wa o tooshite **stay in touch with** shiteimasu.)
to take on a challenge or responsibility willingly
to combine work or resources with another party
to coordinate tasks or schedules with others online
to immediately have a good relationship with someone
to switch off lights when not needed to save energy
to immediately feel a connection or understanding with someo...