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.

   孩子應當孝順父母的觀念早已深入中國人的人心。

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

   對老板忠誠的念頭在他腦海裡是根深蒂固的。

2. 徹頭徹尾的
3. 【紡】生染的

1. ingrain的動詞過去式、過去分詞

adj.

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