1. 沉闷：tediously 沉闷地 | tediousness 沉闷 | tedium 厌烦
2. 乏味, 无聊 (名)：tediously 沉闷地; 冗长而乏味地 (副) | tediousness 乏味, 无聊 (名) | tedium 厌烦, 沉闷 (名)
tediousness的反义词
noun
1. dullness owing to length or slowness
Synonym: tedium tiresomeness