das A und O von etwas sein

➡️das A und O von etwas sein
[ˌdas ˈaː ʊnt ˈoː fɔn ˈɛtvas zaɪ̯n]
.
🇺🇸🇬🇧the essential thing; the be-all and end-all
🇧🇷🇧🇷 o principal, essencial
.
➡️A und O: are the letters A and O, but indicating Alpha and Omega (the first and last letters from the Greek alphabet) / são as letras A e O, mas indicam as letras alfa e ômega (que são a primeira e a última letra do alfabeto grego)
.
➡️von: from / de
.
➡️etwas: something / algo, alguma coisa .
➡️sein: to be / ser, estar