I'm right under you. But take away my first and I'm on top of you.

The first part of me is the chorus when ill, The second a cost, a payment, a bill. My two parts serve to make me whole The ground has given dawn a soul.

I appear as triangle, but I am not geometric. People associate me with river.

I deal in numbers, but I’m not an accountant. I speak in codes, but I’m no spy. A chemist by training, precision’s my ally, you’ll find me where cures are shelved with care, guarding the balance of dosage and dare.

Remove my first letter and I’m a piece of clothing. Remove my second letter and I’m a temple. Rearrange me and I’m something you might do before cooking.