幼维 The determinant on the left is different.

幼 you4 young https://hanziyuan.net/#%E5%B9%BC
雅 ya3 elegant
维 wei2 hold together, maintain, preserve, dimension
https://hanziyuan.net/#%E7%BB%B4

稚 zhi4 infantile, young

 

糹/ 纟Mi string, ribbon, fine silk

https://hanziyuan.net/#%E7%BA%9F

 

幺Yao single thread: thus also thin and by further extension, youngest.

https://hanziyuan.net/#%E5%B9%BA