1. To maintain or keep something mysterious, unclear, or puzzling; to sustain an air of mystery
The director chose to preserve enigma by never revealing the main character's true identity.
O diretor escolheu preservar o enigma nunca revelando a verdadeira identidade do personagem principal.
2. To protect or safeguard something that is mysterious or difficult to understand
The ancient texts preserve enigma about the civilization's true purposes.
Os textos antigos preservam enigma sobre os verdadeiros propósitos da civilização.