bypath的复数形式怎么写？

When they came to the fork of the road, his horse turned left into a bypath as if it were possessed with a demon and began to run headlong down the hill.当他们来到叉路口时, 他的马就好像被鬼缠住似的,转向左边的小路而急速地冲下山坡去....

bypath的音标：bypath的英式发音音标为：['baɪˌpæθ]bypath的美式发音音标为：['baɪˌpæθ]...

n.小路，私道...