声援せいえん Common Noun Irregular Transitive English jmdict 1 noun (common) (futsuumeishi) noun or participle which takes the aux. verb suru transitive verb (shout of) encouragement;cheering;rooting;support その野球の試合の観客は自分達のチームに声援を送った。 The spectators at the baseball match cheered their team on.