1 to help

2 to support

3 to aid

4 aid

5 assistance

1 external help

2 foreign aid

1 reinforcement

2 back-up

3 supporting force

1 assistance

2 a helping hand

3 to lend a hand

1 to climb (by pulling oneself up)

2 to implicate

3 to claim connections of higher status

1 to besiege and strike the relief force (idiom); strategy of surrounding a unit to entice the enemy to reinforce, then striking the new troops

1 to cling to the rich and powerful (idiom); to advance one's career by currying favor

2 social climbing

1 out of ammunition and no hope of reinforcements (idiom); in desperate straits

1 to use claims to kinship or friendship to climb socially (idiom)

1 to cling to the powerful and rich (idiom); social climbing