Also meaning 'Night' or 'Black' in Latin.
Because during the night, one should be sleeping, the word Fosca is an appropriate word one can use when telling someone to go to bed.

Anatidaephobia is defined as a pervasive, irrational fear that one is being watched by a duck. The anatidaephobic individual fears that no matter where they are or what they are doing, a duck watches.

Anatidaephobia is derived from the Greek word "anatidae", meaning ducks, geese or swans and "phobos" meaning fear.