Leery, as in, He was leery of the too-good-to-be-true deals he kept finding on Craigslist.
lucrative
lull
Loyal, likeable and lively are nice words. They begin with the letter L.
Isthmus, island
Perhaps the word you are looking for is limit?
Large.
Leery is a synonym for suspicious.
You can have a Lust for power.
loess
Live wire :)
Luster
Lid
Lorgnette is the alternative name for opera glasses
The word you are looking for is probably - legerdemain. Another synonym for sleight of hand is - Prestidigitation.
Il
"Lucky" is a five letter word beginning with l
Some words to describe a person beginning with L are:lackadaisicallameLatinlaughinglazyleanlegendarylethargiclevel headedlikablelikelylimplithelittlelivelylividloathsomelocallogicallonelyLovablelovelylucidluckylying