Final answer:
In Spanish, the word for "chair" is "silla".
Step-by-step explanation:
To say "chair" in Spanish, you would say "silla". The word "sillon" in your list actually means "armchair" in Spanish. So, if you want to refer to a regular chair, you would use the word "silla". For example, you could say "Ella se sienta en la silla" which means "She sits on the chair".
Learn more about Spanish vocabulary