How to say "Open" in Japanese

When translating "open" into Japanese, you must choose carefully between 開通する and 打ち解ける. In Japanese, 開通する (かいつうする (kaitsū suru)) is typically associated with "to open (for traffic), to be completed (e.g., a tunnel, bridge, line)" (Syllabus Level: N3) and represents Used for infrastructure like roads, railways, tunnels, or new services becoming available for public use. It's an intransitive verb.. On the other hand, 打ち解ける (うちとける (uchitokeru)) maps to "to open one's heart, to become friendly, to relax" (Syllabus Level: N2) and represents To become less reserved, more relaxed and informal with someone, moving from a formal or tense state to a more comfortable and open one. Often used with the particle 「に」.. A literal translation of "open" can often sound unnatural to native Japanese speakers if mixed up!