TOEFL IELTS air Definition The invisible gaseous substance that surrounds the Earth 日本語 地球を囲む不可視の気体 Example "We need oxygen-rich air to breathe." Sign in to save TOEFL Quiz → IELTS Quiz → ← aim airborne → Study tips featuring "air" Study the Exact Words Examiners Use Map Each Word Into a Connected Network Audit Your Own Writing for Lexical Resource Related words TOEFL brighten GRE abash GRE abate GRE abbreviate GRE abbreviation SAT abdicate GRE abduct SAT abet GRE abhor GRE abide SAT abject TOEFL ablaze