safe

Compared meaning: reliable, unlikely to fail or cause problems (adjective).

比较义项：可靠的，稳妥可信、不易出问题的（形容词）。

• sound

  Focuses on being well-reasoned and dependable because it is based on solid judgment, facts or structure, not luck; common for advice, plans, arguments and finances.

  强调因为有扎实的判断、事实或结构作为依据而稳妥可信，而非靠运气；常用于建议、计划、论证和财务状况。

  His financial advisor gave him sound advice about saving for retirement.

  他的理财顾问就退休储蓄给了他可靠的建议。

• safe 本词

  Focuses on low risk of loss, failure or harm; an option is dependable because it avoids danger or uncertainty, common for choices, bets and investments.

  强调风险小、不容易造成损失或伤害；一个选择之所以可靠，是因为能避免危险或不确定性，常用于选择、赌注和投资。

  Choosing that airline is a safe bet since they rarely have delays.

  选择那家航空公司是稳妥的，因为他们很少晚点。

• secure

  Focuses on long-term stability and protection, giving confidence that something will not fail, be lost or taken away; common for jobs, income and relationships.

  强调长期稳定、有保障，让人相信某事物不会失败、丢失或被夺走；常用于工作、收入和人际关系。

  A secure job in the public sector gives him real peace of mind.

  在公共部门有一份稳定可靠的工作让他真正安心。

Sound, safe, and secure all describe something reliable, but differ: sound means well-reasoned, based on solid judgment, used for advice. Safe means low risk of loss or failure, used for choices or investments. Secure means stable and protected over time, giving confidence, used for jobs.

这三个词在“可靠、稳妥、不易出问题”这一义项上意思相近，但侧重点不同：sound 强调基于合理判断或扎实依据而站得住脚，safe 强调风险小、不会带来损失，secure 强调长期稳定、有保障、令人安心。这里不比较 sound 作“声音”的名词义或“健康的、熟睡的”形容词义，不比较 safe“免于人身危险”的义（如例句中戴头盔骑车），也不比较 secure“牢固地关好、锁好”的义（如例句中把门锁好）。