相关单词同义词retarded, inverted, contrary, counter, 近义词 behind, dull, hesitant, late, shy, slow反义词advanced, forward临近词backwards, backup, backwardi, backwardly, backwarder, backward pig, backward set, backwardness, backward jet, backward fall, backward edge, backward echo相似词backtick, backtrack, backup, backup software, backward compatible, backward-looking, backwards, backwash, 返回 backward