/ ˌʌndəˈstændəbl; NAmE -dərˈs-/ adjective
1.
( of behaviour, feelings, reactions, etc. ) seeming normal and reasonable in a particular situation
SYN natural :
Their attitude is perfectly understandable .
It was an understandable mistake to make.
2.
( of language, documents, etc. ) easy to understand
SYN comprehensible :
Warning notices must be readily understandable.