Comparison to English: While “start” and “begin” are near-perfect translations,
开始 (kāishǐ) is more broadly used than the formal English word “commence.” You can use
开始 (kāishǐ) in virtually any context, from a casual “Let's start eating” to a formal “The ceremony will now begin.” In English, “commence” would sound overly formal in a casual setting, but a more formal Chinese equivalent like
启动 (qǐdòng) exists for specific contexts like launching a major project.