Igloo or ice if you mean i?
LIFE
Leukemia is something sad that starts with "l".
Something you do at school starting with L would be Learn.
antarctica
llama
Igloo
The tundra and TCBY ice cream are cold. They begin with the letter t.
A five letter word with the third letter as an 'L' is below. Below is a word used to describe when something is positioned lower than something else.
Leprechaun
Lamp
legwarmers
Quiet