To moan or complain about (something).
To be dismayed or worried about (someone), particularly because of their situation or what has happened to them.
To sing or utter in falsetto.
A person who sings in falsetto.
The "false" (singing) voice in any human, usually airy and lacking a purity of vowels; created by utilizing the next highest vocal folds above those used for speech and normal range singing. It is commonly confused with the head voice register.