ชิล
faŋfɔː sɒŋwɒn fafɔːŋsəwɒŋŋ ɹɪlaks kɪŋwɒn sɒŋwɒn kɪwɒŋŋsəwɒŋŋ ɹɪlakst bʌt tʃɪl hɐz ei5 mɔː kaʒuːəl səʊʃəl kɒnəteɪʃən
In Chinese 放松 (fàngsōng) - relax; 轻松 (qīngsōng) - relaxed, but 'chill' has a more casual, social connotation.
To be relaxed, carefree, and easygoing; to take things lightly and not worry excessively.
Example
"วันนี้ฉันอยากอยู่บ้านชิลๆ."