LEAKPROOF Synonyms

• not open or affording passage or access

• (set theory) of an interval that contains both its endpoints

• not open

• used especially of mouth or eyes

• requiring union membership

• with shutters closed

• not open to the general public

• not having an open mind

• blocked against entry

• completely sealed; completely airtight

• not admitting of penetration or passage into or through

• permitting little if any light to pass through because of denseness of matter

• impossible to understand

• preventing especially liquids to pass or diffuse through

• not admitting of passage or capable of being affected

• established irrevocably

• closed or secured with or as if with a seal

• undisclosed for the time being

• determined irrevocably

• apply a non-porous coating to something so as to ensure it is impervious

• covered with a waterproof coating

• (of walls) covered with a coat of plaster

• impervious to, or not penetrable by, sound

• insulate against noise

• not allowing water to pass in or out

• without flaws or loopholes

• able to withstand exposure to weather without damage

• make resistant to bad weather