with obj.
1- make (someone) be quiet or stop talking使（人）安静, 使…住嘴：
he placed a finger before pursed lips to hush her.
他把食指放在噘起的嘴唇上让她安静。
1.1
- no obj., often in imperative be quiet嘘, 别作声：
Hush! Someone will hear you.
嘘！别人会听见你。
1.2
hush something up
suppress public mention of something隐瞒, 遮掩：management took steps to hush up the dangers.
管理层采取措施隐瞒危险。
词源
mid 16th cent.: back-formation from obsolete husht 'silent, hushed' (taken to be a past participle), from an interjection husht 'quiet!'.