反

1. prefix anti-
2. noun antithesis
3. abbreviation fanqie; traditional Chinese spelling system in which two characters are used: the first one for the onset, the second one for rhyme and tone

たん also 段

1. noun variable measure of fabric (28.8 cm in width); for kimonos: at least 10 m in length; for haori: at least 7.27 m in length; for other clothes: at least 6.06 m in length
2. 300 tsubo (991.74 meters square, 0.24506 acres)
3. six ken (10.91 m)