Spanish shortened form of a word
Apocope is the suppression of some letters at the end of a word.
It can be seen applied to different types of words, for example adjectives, adverbs, numbers, and nouns.
Here are some examples:
bueno → buen: buen día
good day
malo → mal: mal augurio  
bad omen
grande → gran: gran elefante
big elephant
santo → san: San Antonio 
Saint Anthony
primero → primer: primer día
first day
fotografía → foto  
photo → photography
kilogramo → kilo  
kilo → kilogram
