无需质疑爱的英文可以说为 "unquestionable love"。这个说法的来源可能源于对爱情的深刻理解，即爱情是不容置疑的，是无可争议的。

例句：

The bond between a mother and her child is an unquestionable love. 母亲与子女之间的情感是无可质疑的爱。
Despite the challenges they faced, their love for each other remained unquestionable. 尽管他们面临了很多挑战，他们之间的爱依然无可质疑。
His unquestionable love for his wife was evident in the way he cared for her. 他对妻子的无可质疑的爱从他对她的关心中显露出来。