ささやsasayaku
1.

To communicate in a very soft voice, often close to someone's ear, conveying intimate thoughts or secrets without drawing attention.

2.

To express something quietly or subtly, usually suggesting underlying meanings or feelings, and often used in contexts where discretion is required.

3.

To share a piece of gossip or rumor among a small group, indicating the act of discussing something privately without being overt.

Example:

一人の教授がささやいた。