understanding
US /ˌʌn.dɚˈstæn.dɪŋ/
UK /ˌʌn.dɚˈstæn.dɪŋ/

1.
the ability to understand something; comprehension
:
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She has a deep understanding of the subject.
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His lack of understanding led to many mistakes.
2.
sympathetic awareness or tolerance
:
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We need to show more understanding towards others.
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Their mutual understanding helped them through difficult times.
3.
an informal or unstated agreement or arrangement
:
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They came to an understanding about sharing the workload.
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There was a clear understanding that he would pay for dinner.
1.
having or showing a sympathetic awareness or tolerance
:
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He was very understanding about my situation.
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She has an understanding nature.