quiet weeping; silent crying
Crying quietly so as not to be noticed; often implies suppressed sobs or tears shed in secret.
She was weeping quietly under the futon.
I heard quiet weeping from the next room.
Standard kanji spelling.
Mixed kana-kanji spelling, sometimes used for readability.
Compound of 忍び (stealth, secrecy) and 泣き (crying). The exact historical derivation is uncertain, but the meaning is transparent from its components.