Jamieson, Fausset and Brown on Job 31:33

33. Adam--translated by Umbreit, "as men do" (Ho 6:7, where see Margin). But English Version is more natural. The very same word for "hiding" is used in Ge 3:8, 10, of Adam hiding himself from God. Job elsewhere alludes to the flood. So he might easily know of the fall, through the two links which connect Adam and Abraham (about Job's time), namely, Methuselah and Shem. Adam is representative of fallen man's propensity to concealment (Pr 28:13). It was from God that Job did not "hide his iniquity in his bosom," as on the contrary it was from God that "Adam" hid in his lurking-place. This disproves the translation, "as men"; for it is from their fellow men that "men" are chiefly anxious to hide their real character as guilty. Magee, to make the comparison with Adam more exact, for my "bosom" translates, "lurking-place."