aboveboard
1. [ adverb ] in an honest manner
Synonyms: honestly
Examples:

"in he can't get it honestly, he is willing to steal it" "was known for dealing aboveboard in everything"

Related terms: dishonestly honest honest
2. [ adjective ] without concealment or deception; honest
Synonyms: straightforward
Examples:

"their business was open and aboveboard" "straightforward in all his business affairs"

Related terms: straight