How to say "Open" in Japanese

When translating "open" into Japanese, you must choose carefully between 開く and 開通する. In Japanese, 開く (あく (aku)) is typically associated with "to open (intransitive)" (Syllabus Level: N4) and represents Intransitive verb. Used when something opens on its own or is opened by an unspecified agent. On the other hand, 開通する (かいつうする (kaitsū suru)) maps to "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.. A literal translation of "open" can often sound unnatural to native Japanese speakers if mixed up!