/rʌt; rʌt/
n [C]
1 deep track made by a wheel or wheels in soft ground; furrow 车辙; 　沟
*My bike bumped over the ruts. 我的自行车在凹凸不平的车辙道上颠颠簸簸.
2 (idm 习语) be (stuck) in a `rut have a fixed and boring way of life 囿于刻板而乏味的生活方式. get into/out of a `rut start/stop leading a routine existence 开始[不再]过刻板的生活
*It's time to get out of the
9 to
5 rut, ie of the normal working day. 应该摆脱开9点上班5点下班那种刻板的生活了.

v (-tt-) [Tn esp passive 尤用于被动语态] mark (sth) with ruts 在（某物）上形成车辙; 使（某物）留下凹痕
*The lane was rutted with tyre tracks. 这小巷有车胎轧出的凹痕.
* a deeply rutted road 留有很深车辙的路.

/rʌt; rʌt/
n (also the rut) [U] periodic sexual excitement of a male deer, goat, ram, etc （雄性的鹿、羊等的周期的）性冲动
*stags fight during the rut 雄鹿之间在交配期的格斗.

v (-tt-) [I] be affected by this （雄性的鹿、羊等周期地）性冲动
*a rutting stag 准备交配的雄鹿.

n
[Sense: 1-2; Date: 1500-1600; Origin: Perhaps from Old French route; ROUTE¹]
[Sense: 3; Date: 1100-1200; Language: Old French;Origin:'loud sound made by a deer', from Latin rugire 'to roar']
[C]
a deep narrow track left in soft ground by a wheel
in a rut
living or working in a situation that never changes, so that you feel bored
　I was stuck in a rut and decided to look for a new job.
[U]alsothe rut
technical the period of the year when some male animals, especially deer, are sexually active
in rut
　a stag in rut