'永远' (yǒngyuǎn) literally combines '永' (yǒng), meaning 'eternal' or 'endless', and '远' (yuǎn), meaning 'distant' or 'far'. Together, they express an unbounded duration—neither beginning nor end—conveying the English concepts of 'forever' or 'always'. It emphasizes permanence and continuity, often used to describe enduring states, feelings, commitments, or natural truths.

This adverb typically modifies verbs, adjectives, or entire clauses and appears in both formal and informal speech. It’s common in declarations of love ('我永远爱你'), promises ('我永远支持你'), philosophical statements ('时间永远向前'), and poetic or emotional contexts. Unlike temporal nouns like '明天' or '去年', '永远' has no measurable unit—it refers to infinite time, making it more abstract and emphatic than words like '总是' (always, as a habitual frequency).