ingrained
/ˌɪnˈgreɪnd/adjective
(亦作engrained)
1
- (of a habit, belief, or attitude) firmly fixed or established; difficult to change（习惯, 信仰, 态度）根深蒂固的：
his deeply ingrained Catholic convictions.
他根深蒂固的天主教信仰。
2
- (of dirt or a stain) deeply embedded and thus difficult to remove（污垢, 污点）难以去除的：
the ingrained dirt on the flaking paintwork.
开裂剥落油漆层上难以去除的污垢。