#1
lessen v. [
decrease, diminish, fall] decrease in size, extent, or range; "The amount of homework decreased towards the end of the semester"; "The cabin pressure fell dramatically"; "her weight fell to under a hundred pounds"; "his voice fell to a whisper"
. wn #2
lessen v. [
decrease, minify] make smaller; "He decreased his staff"
. wn #3
lessen v. [
subside] wear off or die down; "The pain subsided"
. wn