原因

原来 yuánlái HSK 2 #1,006

originally / as it turns out / so that's how it is

因为 yīnwèi HSK 2 #72

because / owing to

因此 yīncǐ HSK 3 #1,056

therefore / thus / for this reason

原则 yuánzé HSK 4 #3,265

principle; doctrine / rule; fundamental guideline

原始 yuánshǐ HSK 5 #4,482

original / primitive / primeval

因 yīn HSK 6 #1,036

because; due to / cause; reason / because of; on account of

原先 yuánxiān HSK 5 #7,627

originally / formerly / at first

原理 yuánlǐ HSK 5 #8,741

principle / theory / fundamental truth

原谅 yuánliàng HSK 6 #912

to forgive; to pardon; to excuse

原 yuán HSK 6 #1,637

original; former / plain; prairie / source; origin