TUNNEL LINING=the timber, brick, concrete, or steel supports erected in a tunnel to maintain dimensions and safe working conditions.

the word tunnel-lined is closely-linked with tunels but we can use it also to describe other things

When man slaps his semi hard penis on the extended tongue of woman.

A person that only uses 2 lines in their rap verses when freestyling/battling.

To indicate ones acceptance to take intercourse in the anus.

A fairly predictable point along a hiking trail, beyond which you will no longer find anyone wearing Ugg’s.

A vaccine line is still a line to fall into. Instead of being told another country (like China) is the enemy, people are told the coronavirus is the enemy. If you don't stand for something, you'll fall in line for anything you're told you're supposed to fall in line for.

the way to determine if a relation is a function