tan·bark 
(tănbärk′)
(tănbärk′)n.
1. The bark of various trees used as a source of tannin.
2. Shredded bark from which the tannin has been extracted, used to cover circus arenas, racetracks, and other surfaces.
- inappreciatively
- inapproachability
- inapproachable
- inapproachably
- inappropriate
- inappropriately
- inappropriateness
- inapt
- inaptitude
- inaptly
- inaptness
- inarguable
- inarguably
- Inari
- inarticulacy
- inarticulate
- inarticulately
- inarticulateness
- inartistic
- inartistically
- inasmuch as
- in a/some measure
- in at/on the kill
- inattention
- inattentive