A. Antisocial
B. Glorious
C. Horrendous
D. Similar
Gregarious : Sociable.
Antisocial : Contrary to the law and customs of the society.
Glorious : Celebrated ,famous.
Horrendous : Extremely unpleasant.
Similar : Having a resemblance in appearance, character,or quantity,without being identical.
Antonym of Gregarious is Antisocial.
