ABOVEBOARD
aboveboard, straightforward
(adjective) without concealment or deception; honest; “their business was open and aboveboard”; “straightforward in all his business affairs”
honestly, aboveboard
(adverb) in an honest manner; “in he can’t get it honestly, he is willing to steal it”; “was known for dealing aboveboard in everything”
Source: WordNet® 3.1
Adjective
aboveboard (not comparable)
Alternative form of above-board
Source: Wiktionary
A*bove"board`, adv.
Definition: Above the board or table. Hence: in open sight; without trick,
concealment, or deception. "Fair and aboveboard." Burke.
Note: This expression is said by Johnson to have been borrowed from
gamesters, who, when they change their cards, put their hands under
the table.
Source: Webster’s Unabridged Dictionary 1913 Edition