1. 调查：inquest 查询 | inquire into 调查 | inquiry 询问

2. 探究：inquire for 要找 | inquire into 探究 | inquire of someone 查问某人

3. 调查,查究：inquire after问候 | inquire into调查,查究 | inside and out里里外外;彻底地

4. 追究,调查：be ignorant of 不知道,不了解 | inquire into 追究,调查 | inquire sth. of sb. 向某人打听某事