1. (verb) fix firmly or securely

• intrench

2. (verb) impinge or infringe upon

• encroach
• impinge
• trench

3. (verb) occupy a trench or secured area

• dig in

1. (verb) fix firmly or securely

• fasten
• fix
• secure

2. (verb) impinge or infringe upon

• take advantage
• trespass

1. (verb) impinge or infringe upon

• contact
• impinging
• striking
• encroachment
• encroachment
• impact
• impact
• impingement
• impingement

2. (verb) occupy a trench or secured area

• entrenchment
• intrenchment