childproof

or child-proof

[ chahyld-proof ]

adjective

1. resistant to being opened, tampered with, or operated by a child:

   a childproof medicine bottle.

2. made free of hazard for a child:

   a childproof home.

3. made safe from damage by children:

   a childproof living room free of breakable objects.

verb (used with object)

1. to make childproof:

   to childproof a home.

Word History and Origins

Origin of childproof¹

First recorded in 1955–60; child + -proof

Example Sentences

All e-cigarettes need to have childproof locks built in, and companies can’t produce or sell fruit-flavored e-cigarettes, which are controversial for attracting children to vaping.

From MIT Technology Review

That also goes for medication bottles labeled as child-resistant—they’re not childproof.

From Popular-Science