To ignore completely; to pretend not to hear.
置放，摆；若好象。放在一边，好象没有听见似的。指不予理睬。
清·曹雪芹《红楼梦》第十六回宁荣两府上下内外人等，莫不置若罔闻，独有宝玉～。”
He turned a deaf ear to the warnings, continuing down the dangerous path.
Learn the next connected idiom: 置若罔闻 (zhì ruò wǎng wén) → 闻名遐迩 (wén míng xiá ěr)
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