Formal:
* Malayo: This literally means "far" and can be used to describe someone who is physically or emotionally distant.
* Walang pakialam: This means "unconcerned" or "not interested" and can be used to describe someone who is indifferent to others.
* Walang pakikisalamuha: This means "not sociable" and describes someone who avoids interacting with others.
Informal:
* Suplado: This is a more informal word that describes someone who is arrogant and aloof.
* Mayabang: This means "boastful" and can also describe someone who is aloof because they think they are better than others.
* Walang pakialam: This can also be used informally to describe someone who is aloof and doesn't care about others.
The best translation will depend on the context and the specific meaning you want to convey.