Haag's theorem complicates the rigorous formulation of perturbation theory in interacting, relativistic quantum field theories.

He ate a ha'f sandwich at lunch and saved the other half for later.

I ha'n't seen rain like this in years.

During Sefirat Ha'Omer, we light a candle each evening and reflect on spiritual growth.

We nearly managed to spoil the ship for a ha'p'orth of tar by refusing to buy the extra sealant the night before the voyage.

After paying the rent, they didn't have two ha'pennies for a penny to spare.

The promised bonus was, in reality, more kicks than ha'pence.

The old woman slipped a ha'penny starver into the child's coat pocket before he left.

The ha'penny starvers lined up outside the soup kitchen before dawn, clutching their worn bowls.

At the cultural fair, several haafus spoke about balancing Japanese customs with those from their other culture.