cannot
Concise Oxford English Dictionary © 2008 Oxford University Press:
cannot/ˈkanɒt/
▶contraction can not.
usage: Both the one-word form cannot and the two-word form can not are acceptable, but cannot is far more common. Reserve the two-word form for constructions in which not is part of a set phrase, such as ‘not only … but (also)’: Paul can not only sing well, he also paints brilliantly.
'cannot' also found in these Oxford entries:
abide
- act
- ad litem
- apple-pie bed
- bad debt
- bite
- blur
- buck
- can't
- checkmate
- club foot
- contingency
- critical temperature
- cumulative preference share
- cy-pres
- data
- day care
- day centre
- die
- dingus
- displacement activity
- divorce
- doctor
- doodah
- doohickey
- dummy
- element
- end
- evanescent
- eye
- fair-weather friend
- few
- FOAF
- gas
- goner
- hard-code
- hearsay
- heir apparent
- help
- humpty-dumpty
- incommensurable
- indeterminate
- invisible ink
- je ne sais quoi
- kill
- life interest
- life peer
- locknut
- lost
