ThisHere

este
=
this
e.g.
 este
libre  (this book)

Reflects gender and plurality of related noun, as follows:

	Masculine	Feminine
este	este cinturon  (aqui)		This belt (here)
	estes cinturones		These belts
		esta chaqueta	This jacket
		estas chaquetas	These jackets
ese	ese cinturon		That belt
	eses cinturones		Those belts
		esa chaqueta	That jacket
		esas chaquetas	Those jackets

cuál
= which
e.g.
 ¿cuál
libre?     
        which
book?
   
          éste
libre   
      
    this
book

or
 
 ¿cuál?
    
       
        which one?
   
          éste   
       
      
    this one

aqui
= here
alli
  =
there

Additionally,
when “that” refers to
something further away, use “aquel”, in its various forms:

	Masculine	Feminine
aquel	aquel cinturon (alli)		That belt (there)
	aquellos cinturones		Those belts
		aquella chaqueta	That jacket
		aquellas chaquetas	Those jackets