Amen (אָמֵן, ʾāmēn; ἀμήν, amḗn; ܐܡܝܢ, 'amīn; آمين, ʾāmīn) is an Abrahamic declaration of affirmation which is first found in the Hebrew Bible, and subsequently found in the New Testament. It is used in Jewish, Christian, and Muslim practices as a concluding word, or as a response to a prayer. Common English translations of the word amen include "verily", "truly", "it is true", and "let it be so". It is also used colloquially, to express strong agreement.
In English, the word amen has two primary pronunciations, (/ɑːˈmɛn/) or (/eɪˈmɛn/), with minor additional variation in emphasis (e.g., the two syllables may be equally stressed instead of placing primary stress on the second). In Anglophone North American usage, the ah-men pronunciation is used in performances of classical music and in churches with more formalized liturgy.
The ay-men pronunciation is a product of the Great Vowel Shift (i.e., it dates from the 15th century); it is associated with Irish Protestantism and with conservative evangelical denominations generally. It is also the pronunciation typically used in gospel music.
Amen is a word of Biblical Hebrew origin. It appears many times in the Hebrew Bible as a confirmatory response, especially following blessings. The basic triconsonantal root א-מ-נ, from which the word is derived, is common to a number of languages in the Semitic branch of the Afroasiatic languages, including biblical Aramaic. Meanings of the root in Hebrew include to be firm or confirmed, to be reliable or dependable, to be faithful, to have faith, to believe. The word was imported into Greek from the Judaism of the early Church. From Greek, amen entered other European languages. According to a standard dictionary etymology of the English word, amen passed from Greek into Late Latin, and thence into English.
From Hebrew, the word was later adopted into the Arabic religious vocabulary and leveled to the Arabic root ء م ن , which is of similar meanings to the Hebrew.