(biblical) Ai (an ancient city in Canaan, mentioned in the Book of Joshua) / (biblical) Ai (an ancient city mentioned in the Book of Jeremiah)

ouch (expression of physical pain) / oh (expression of concern)

forms the 2ⁿᵈ-person plural affirmative imperative of 1ˢᵗ conjugation verbs; appended to the stem

(Brazil, historical) AI-5 (a major decree (which lasted from 1968 to 1978) issued by the military dictatorship (1964–1985) in Brazil, which overruled the Constitution and included institutionalizing censorship of the media, forfeiting the mandates of some politicians and some people's right to vote)

alas, woe is me (exclamation of sorrow)

(minced oath, Portugal) expression of surprise, contempt, outrage, disgust, boredom, frustration

Buenos Aires (the capital city of Argentina) / Buenos Aires (a province of Argentina)

air guitar (imaginary guitar that a person pretends to play)

airbag

Alternative form of ailerão