"racking" in the verb sense
1. single-foot, rack
go at a rack
"the horses single-footed"
stretch to the limits
"rack one's brains"
put on a rack and pinion
"rack a camera"
4. extort, squeeze, rack, gouge, wring
obtain by coercion or intimidation
"They extorted money from the executive by threatening to reveal his past to the company boss"
"They squeezed money from the owner of the business by threatening him"
5. scud, rack
run before a gale
fly in high wind
draw off from the lees
8. torment, torture, excruciate, rack
torment emotionally or mentally
work on a rack
seize together, as of parallel ropes of a tackle in order to prevent running through the block
torture on the rack
"racking" in the adjective sense
1. racking, wrenching
causing great physical or mental suffering
"a wrenching pain"
Source: WordNet® (An amazing lexical database of English)
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