alone
//əˈloʊn//
Adjective
1
Without any other people present; by oneself.
She lives alone in a small apartment.
2
Isolated from others; lacking companionship or support.
She felt alone in the big city with no friends or family nearby.
3
Unique or unequaled; standing apart from others.
She stands alone in her field of expertise.
Antonym
Adverb
1
Only; exclusively; without others.
She alone knows the truth.
2
Without help or assistance from others.
She built the entire website alone.