IPA: /ɡrəˈɡɛr.i.əs/
KK: /grɪˈɡɛr.i.əs/
Enjoying being with other people and often seeking their company; social and friendly.
She is very gregarious and loves to host parties for her friends.
Gregarious → It is formed from "gregis" (meaning flock or herd) and the suffix "-ous" (meaning full of or characterized by). The word "gregarious" describes someone who is characterized by a fondness for being in a flock or group, hence sociable.
Think of someone who is 'full of' ('-ous') a desire to be in a 'flock' ('gregis') — that's why gregarious means sociable.