any one
No particular individual
Any one, written as two words, emphasizes individual selection from a group: Any one of these candidates could win.
It differs from the single word "anyone," which means any person at all.
The two-word form stresses singularity—one specific item or person chosen from among several possibilities: Pick any one you like.
One in number
- particularSpecific or fussy
- specificClearly defined, not vague
- oneLowest positive integer
- someoneUnnamed individual
each · lone · sole · solitary · given · certain · chosen · selected
Without distinguishing qualities
- unspecifiedNot explicitly named
- genericNot brand-name
- anonymousOf unknown origin
- randomOccurring without pattern
arbitrary · whichever · whatever · unnamed · faceless · interchangeable · undifferentiated · nonspecific
single
One in number
- particularSpecific or fussy
- specificClearly defined, not vague
- oneLowest positive integer
someone · each · lone · sole · solitary · given · certain · chosen · selected · picked
nondescript
Without distinguishing qualities
- unspecifiedNot explicitly named
- genericNot brand-name
- anonymousOf unknown origin
random · arbitrary · whichever · whatever · unnamed · faceless · interchangeable · undifferentiated · nonspecific · vague