Causing decay by chemical reaction. corrosive substance.

Being the inside part of a building, car etc.. inside.

physical or real. Hard building material made of cement, sand, water. cover with concrete.

The specific use of a machine, idea, or discovery. Software programs, e.g. for smart phone.

heavy object for mooring ship. Metal hook on a rope used to stop boats moving. moor ship with anchor.

Of the top layer; not deep or meaningful. Outside or upper layer of something. To come to the top of something; emerge.

Length around an outer boundary, e.g. a circle.

forming or relating to outside. Way a person appears or seems to other people.

To make a rule, law or system tougher.

Being the most powerful.

In, at or to any place. Use to indicate limits or variation. any place.

in most essential respects.

designed to be pulled out of usual position. pull-out section of magazine or newspaper.

of or found in salt water. Water containing salts such as the ocean.

Being perfect and without damage or soil.