黙認 もくにん
mokunin

Noun
Suru Verb

1. tacit approval; tacit permission; connivance; acquiescence; toleration; overlooking

Transitive
どうして きみはそのような おこないが黙認 もくにんできるのだろうか。
dōshite kimiwa sono yōna okonaiga mokunin dekiru nodarōka.
How can you tolerate such a deed?