to not share thoughts or feelings with others
自分の考えや感情を他人と共有しない (jibun no kangae ya kanjō o tanin to kyōyū shinai)
"He usually keeps to himself and doesn’t talk much."
"彼は通常、自分の中に留まってあまり話さない。" (kare wa tsūjō, **jibun no naka ni todomatte** amari hanasanai.)
to keep pace with what’s being shared on a virtual screen or...
to manage or function well in a particular situation or cult...
to stay connected with reality and remain calm
to include a file or document with an email
to switch from one system or platform to another
to make systems or devices work together in harmony
