together, with
Indicates that an action involves more than one party or that something is done together with someone or something else.
We add -랑 after a word that ends in a vowel.
We add -이랑 after a word that ends with a consonant.
(이)랑 can also indicate the target with which the subject performs an action and corresponds to ''(together) with'' in English. When indicating such a relationship, 같이 and 함께 normally follow the particle. For nouns ending in a vowel, 랑 is used, and for nouns ending in a consonant, 이랑 is used.