Righteous

What are the Greek and Hebrew words which are translated by the word "righteous" or "just"? The Online Etymological Dictionary has the following for "righteous":

early 16c. alteration of rightwise, from O.E. rihtwis, from riht (see right) + wis "wise, way, manner." Suffix altered by influence of courteous, etc. Meaning "genuine, excellent" is c.1900 in jazz slang. Related: Righteousness.

And for right:

right (adj.1)

"morally correct," O.E. riht "just, good, fair, proper, fitting, straight," from P.Gmc. *rekhtaz (cf. O.H.G. reht, Ger. recht, O.N. rettr, Goth. raihts), from PIE base *reg- "move in a straight line," also "to rule, to lead straight, to put right" (see regal; cf. Gk. orektos "stretched out, upright;" L. rectus "straight, right;" O.Pers. rasta- "straight, right," aršta- "rectitude;" O.Ir. recht "law;" Welsh rhaith, Breton reiz "just, righteous, wise"). 

"Straight" as describing the path one takes [to God]?

The word can describe a person with respect to his actions in relation to God. (His moral orientation?) Is this what is conveyed by the Hebrew and Greek?