[ noun ]
■ a settled and monotonous routine that is hard to escape
e.g.)
・they fell into a conversational rut
→
groove
[ noun ]
■ a groove or furrow (especially one in soft earth caused by wheels)
[ noun ]
■ applies to nonhuman mammals: a state or period of heightened sexual arousal and activity
→
estrus
,
heat
,
oestrus
[ verb ]
■ hollow out in the form of a furrow or groove
→
furrow
,
groove
[ verb ]
■ be in a state of sexual excitement
■ of male mammals
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