ingrained

节俭的习惯在他童年时就已根深蒂固。

The habit of frugality was ___ingrained in him from childhood.

她节俭的习惯是从小养成的，很难改变。

Her frugal habits are ___ingrained from childhood and hard to change.

她根深蒂固的乐观态度帮助她度过了许多困难时期。

Her deeply ___ingrained optimism helped her through many tough times.