zug·un·ru·he or Zug·un·ru·he 
(tskn′r-ə)
(tskn′r-ə)n.
The migratory drive in animals, especially birds.
[German : Zug, a pulling, move, migration; see ZUGZWANG + Unruhe, restlessness (from Middle High German unruowe, from Old High German unruowa : un-, not; see ne in the Appendix of Indo-European roots + ruowa, rest).]
- appreciably
- appreciate
- appreciation
- appreciative
- appreciatively
- appreciativeness
- appreciator
- appreciatory
- apprehend
- apprehender
- apprehensible
- apprehensibly
- apprehension
- apprehensive
- apprehensively
- apprehensiveness
- apprentice
- apprenticeship
- appressed
- appressorium
- apprise
- apprize
- approach
- approachability
- approachable