Aboveboard
Part of speech: adjective
Definition: Above the board or table. Hence: in open sight; without trick, concealment, or deception.
Straightforward
Part of speech: adjective
Definition: Proceeding in a straight course or manner; not deviating; honest; frank.
Part of speech: adverb
Definition: In a straightforward manner.
Example sentence: I try to be straightforward and honest with my kids, and I believe nothing beats good old hard work.