a.

1. 根深蒂固的
   That children should have filial piety toward their parents is deeply ingrained in the minds of the Chinese people.

   孩子应当孝顺父母的观念早已深入中国人的人心。

   The idea of being loyal to his boss has been too deeply ingrained in his mind.

   对老板忠诚的念头在他脑海里是根深蒂固的。

2. 彻头彻尾的
3. 【纺】生染的

adj.

1. (of a habit or attitude) firmly established.
2. (of dirt) deeply embedded.