Commentary: Syntax Is: NP1 LESSEN (NP2)
Examples:
The amount of homework has lessened.
He lessened his tenants' arrears for the time being.
After a few days, the pain lessened, allowing him to start resuming
normal activities and work.
Mappings:
VerbNet: other_cos-45.4
FrameNet: NP
PropBank: lessen.01
WordNet 3.0 Sense Numbers: 1, 2, 3