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理屈， 理窟， りくつ
1. theory, reason, logic
2. (unreasonable) argument, strained logic, excuse, pretext
理论、理由、逻辑；(不合理的)论点，牵强的逻辑，借口，托辞
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退屈， たいくつ
1. tedious, boring, dull, uninteresting, tiresome, monotonous
2. to feel bored, to get bored (with), to get tired (of)
乏味的，无聊的，沉闷的，无趣的，令人厌倦的，单调的；感到无聊，感到厌烦，感到厌倦