Prefix used before a number or the question word 几 jǐ to form an ordinal number indicating sequence or rank

the number six; 6; complex form used in financial contexts is 陆 lù

(bound form) a feeling or emotion; also used as a suffix for a "sense of" something, such as a 责任感 zé​rèn​gǎn or 幽默感 yōu​mò​gǎn