節奏 is read as せっそう (sessou) and means rhythm.
せっそう
sessou
せちぶ
last day of any season (according to the traditional Japanese calendar)
せつやく
economising
せっく
seasonal festival
ふしめ
knot (in a tree, etc.)
せつど
moderation
integrity
せつげん
retrenchment
せっすい
saving water
せっせい
せつでん
saving electricity
せちにち
せちえ
seasonal court banquet