亦

• Pinyin: yì
• Hanzi breakdown: 亦 = 大 (person with spread arms) + two underarm marks — originally indicating the armpit; semantically extended to also/likewise in classical Chinese

Meaning

Also; too; likewise. A classical adverb equivalent to 也, used in formal, literary, or written language.

Exclusively literary and formal; never used in casual spoken Chinese, where 也 is the standard equivalent. Appears in classical idioms such as 亦步亦趋 and 人云亦云, and in formal prose. Carries an elevated, archaic register that adds weight or solemnity to writing. Common in official documents, academic texts, and literary quotations.

Examples

1. 学者认为，经济的繁荣固然重要，社会公平与文化传承亦不可忽视，三者缺一不可。 Scholars believe that while economic prosperity is certainly important, social equity and cultural inheritance must not be overlooked either—none of the three can be missing.
2. 他在专业领域成就卓越，在公益事业方面亦贡献良多，被业界誉为学者与慈善家的结合体。 He has achieved outstanding success in his professional field, and he has also made major contributions to public service; the industry praises him as a rare combination of scholar and philanthropist.
3. 古人云：知之为知之，不知为不知，此乃为学之道，亦是做人之本。 As the ancients said: Treat what you know as what you know, and what you don’t know as what you don’t know—this is the way to learn, and it’s also the foundation of being a decent person.

Usage Guide

Context: literature, academic writing, official documents, classical Chinese

Tone: neutral

Do Say

• 本研究不仅验证了假设一的有效性，亦意外发现市场分层与消费者信任度正相关。(This study not only confirmed Hypothesis 1, but also unexpectedly found a positive correlation between market segmentation and consumer trust.)
• 大国竞争不仅在军经领域，在科技标准、国际规则和叙事话语权上亦日趋激烈。(Great-power competition is not only in military and economic fields; it is also becoming increasingly intense over technology standards, international rules, and narrative power.)

Don't Say

• 我亦要去 — 亦 is classical/literary; in everyday speech use 我也要去; 亦 in casual conversation sounds artificially archaic

Origin & History

亦 = 大 (a person with arms spread wide) with two marks beneath the arms indicating the armpits; by extension, meaning likewise or in the same way

Cultural Context

Era: Classical–Modern

Generation: Older, educated

Social background: Universal