security blanket; comfort blanket; comfort object
A towel or similar cloth item that a child uses for emotional comfort, analogous to a security blanket. Often used in parenting contexts.
See also: 安心毛布
My child can't sleep without their comfort blanket.
I take my security blanket to nursery school.
Compound of 安心 (peace of mind) and タオル (towel), modeled after 安心毛布 (security blanket).