二人の間には暗黙の了解があったに違いない。の英語

There must've been a tacit understanding between them.

There must have been a tacit understanding between them.

There must have been a tacit understanding between them.

There was an unspoken agreement [a tacit understanding] between the two of them.

It must have been agreed upon between the two.

Their relationship was more or less publicly admitted.

There seems to have been some difference―some jar―between them.

A gulf lies between the two.

A compromise has been effected between the two.

Each of them silently guessed what was in the other's mind.

A compromise has been reached [effected] between them.

They have effected a compromise.

A gulf divided him from them.

A compromise was reached between them.

They were on very familiar terms.

They had always been very close.

There is a misunderstanding between the two

A gulf lies between the two.

There is no mutual understanding between the two

There is a misunderstanding between the two

A gulf lies between the two.

I wonder if anything has passed between them.

of a relationship between two persons, being familiar with and able to talk freely with each other

The ill feeling between the two has been dispelled.

It is suspected that there was a liaison [an amorous relationship] between the two.

There seems to have been some jar between the two.

There seems to have been some jar between them.

A gulf lies between the two.

There should be no secret between husband and wife.

It seems that he has no improper relations with her.