Lend. Let, afford, furnish, loan, advance, grant.
Ant. Refuse, withhold, retain, appropriate, withdraw; recall.
Lengthen. Elongate, stretch, extend, prolong.
Ant. Shorten, contract, confine, narrow.
Lengthy. Long, drawn out, tedious, verbose, diffuse, prolix.
Ant. Concise, comprehensive, laconic, short, brief, condensed, succinct, compact.
Lenient. Merciful, mild, relaxing, assuasive, softening, compassionate.
Ant. Harsh, cruel, hard, severe, stern.
Lessen. Diminish, reduce, decrease, abate, lower, impair, degrade, weaken.
Ant. Increase, enlarge, extend, develop, heighten, multiply, strengthen, spread, enhance.