lowering
The origin and history of lowering.
Etymology
c. 1600, "descend, sink, grow less or lower" (intransitive), from lower (adj.), comparative of low (adj.). Transitive meaning "let down, cause to descend" attested from 1650s. Related: Lowered; lowering. In the transitive sense "to cause to descend" the older verb was low. From Middle English lahghenn, (c. 1200), which continued in use into the 18c.