1 to involve

2 to touch upon (a topic)

1 to be a suspect (in a crime)

2 to be suspected of

1 to negotiate (with)

2 to have dealings (with)

1 to interfere

2 to meddle

3 interference

1 to wade

2 to be involved

3 to concern

4 to experience

5 to enter (classical)

1 to climb mountains and wade rivers (idiom); fig. to make a long and difficult journey

1 to travel over land and water (idiom)