main cause; primary factor
labor; labour; manpower; working force
machine; mechanism; instrument; appliance; apparatus
separation; partition; detachment; segregation; isolation
skill; dexterity; proficiency
standard; basis; criterion; norm; reference; datum
ability; performance; efficiency
to cover; to hide; to conceal; to wrap; to disguise
confusion; mixing; merger
level; standard; water level
still more; to say nothing of; not to mention; still less
existing technology; conventional technology; prior art
not only ... (but also); not just; as well as
notice; attention; observation
to detach; to decapitate; to cut loose; to let loose; to dismember
household economy; family finances
to let out; to utter; to issue; to send; to leave; to depart
up through; up until; down to; from ... to ... (e.g. from head to toe); everything from ... to ...
mixing; mixture; meld; miscegenation
vague; obscure; indistinct; hazy; ambiguous
remainder; remnant; (not) very; (not) much; too much; excessively
direction; orientation; bearing; course (e.g. of action)
tale; short story; sketch comedy; skit
sun; saint; San (people); son