To Blow In
To Breathe Into, To Imbue
intransitive verb, transitive verb, godan verb
You know that 吹く is "to blow" and the kanji 込 means into. So this word means to blow in or to breathe into, and it can be used both transitively and intransitively.
It can also be used figuratively to mean to breathe into orto imbue, like breathing new life into something, or imbuing someone’s mind with hatred.
The reading comes from the word 吹く and the kanji 込む.
家はおんぼろで、嵐が来る度に雨風が吹き込むのが現実です。
The reality is that the house is so old that the rain and wind blows in whenever a storm comes.