spruce1
  
  adj.
 neat and smart.
v.
 
(
spruce someone/thing up)
 make a person or place smarter.
Derivative
  
    - sprucely adv.
- spruceness n.
 
  Etymology
  C16: perh. from spruce2 in the obs. sense ‘Prussian’, in the phr. spruce (leather) jerkin.
 
  
    
spruce2
  
  n.
 a widespread coniferous tree which has a distinctive conical shape and hanging cones, grown for wood, pulp, and Christmas trees. 
[Genus 
Picea: many species.]
Etymology
  ME (denoting Prussia or something originating in Prussia): alt. of obs. Pruce ‘Prussia’.
 
  
    
spruce3
  
  v.
 Brit. informal, dated engage in pretence, especially by feigning illness.
Derivative
  
  Etymology
  early 20th cent.: of unknown origin.