atren

As a noun terms

is .

As a verb atren is

(obsolete) to run away; escape.

In intransitive obsolete terms the difference between atren and atrin

is that atren is to run away; escape while atrin is to run away; escape (from).

As a verb atren

is (obsolete) to run away; escape.

As a noun tren is

train.

As verbs the difference between outrun and atren

is that outrun is to run faster than the others while atren is to run away; escape.

As a noun outrun

is the sheepdog's initial run towards the sheep, done in a curving motion so as not to startle them.

As verbs the difference between escape and atren

is that escape is while atren is (obsolete) to run away; escape.