It's "contratista." It can be either male [el] or female [la], depending on the gender of the "contratista" in question.
The possessive form for the noun contractor is contractor's. Examples: The contractor's tools were at my house. I am going to the contractor's building tomorrow to discuss the cost.
no hay aparcamiento contratista
contractor
Translation: Contratista de calefacción
That contractor is beginning a huge building project in Fulton County next month.
There is no abbreviation for 'contractor" unless you are using it in the construction field. Then you can use the acronym 'Contr'.
The spanish word for guitar is Guitarra. This English word came directly from the Spanish word, but it is not a Spanish word any more than the Spanish word is an Arabic word. "qutar" or a Greek word Chirara.
The spanish word for did is hizo.
"De" is the Spanish word for "of".
"Con" is the spanish word for "with".
The Spanish word for "who" is "quién".
The Spanish word for "in" is "en".