for

Because.

I had to stay with my wicked stepmother, for I had nowhere else to go.

[…]Dismount thy tuck, be yare in thy preparation, for thy assailant is quick, skillful and deadly.

Towards; in the direction of.

The astronauts headed for the moon.

Run for the hills!

Directed at; intended to belong to.

I have something for you.

In order to help, benefit, gratify, honor etc. (someone or something).

Everything I do, I do for you.

We're having a birthday party for Janet.

Befitting of someone’s beliefs, needs, wants, skills, or tastes; best suited to.

I’ll strike a blow for you.

If having to bag the groceries correctly is more than you can handle, then this isn't the job for you.

To be used or treated in a stated way, or with a stated purpose.

This is a new bell for my bicycle.

The cake is for Tom and Helen's anniversary.

To; (the particle for marking the following verb as an infinitive).

Ugh—I’ll not be able for get up. Send for M’sieu le Curé—I’ll be goin’ for die for sure.

[It was a] firs rate place for shoot a woodcocks, I tell you. […] I say [it] wass no use for spen money. […] An I say in "So wass I. I see lot of sy-pokes fly up an twist off like screw-cork an spit whistle, but I wass'nt able for get aim on him."