无由: [书面语] not be in a position (to do sth.); have no way (of doing sth.)
灾: 名词1.(灾害) disaster; calamity 短语和例子受灾 be stricken by disaster; 天灾 natural calamities; 救灾 provide disaster relief; 虫灾 plague of insects2.(个人的不幸) personal misfortune; adversity; unluckiness 短语