Contractions are shortened versions of words or word groups created by the omission of a sound or letters. These words often serve to maintain a more flowing pronunciation of the language. In English "don't" and "can't" are two examples.
aux
to the
plural
l'
the
before vowel definite
him
accusative personal
her
accusative personal
it
before vowel accusative personal
au
to the
masculine singular
m'
me
before vowel accusative personal