Straightest

adjective

1. Not crooked or bent; having a constant direction throughout its length.
2. (of a path, trajectory, etc.) Direct, undeviating.
3. Perfectly horizontal or vertical; not diagonal or oblique.
4. Describing the bat as held so as not to incline to either side; on, or near a line running between the two wickets.
5. Direct in communication; unevasive, straightforward.