A short note thanking someone who has recently provided the writer with hospitality.

Very little.

For free. / For no reason, wastefully, or pointlessly

Not on the agenda; not of importance; not of current importance.

Not tropical; not characteristic of or located in the tropics.

(medicine) Coeliac disease.

Not glutinous; without gluten.

A matter of no concern, especially one that had been of concern.

(informal) Synonym of no problem

Alternative spelling of noncanonical