Châshab (חָשַׁב, Strong's #2803), “to think, account, reckon, devise, plan.” This word is found throughout the historical development of Hebrew and Aramaic. Found at least 120 times in the Hebrew Bible, châshab occurs in the text for the first time in Gen. 15:6, where it was said of Abraham: “He believed the Lord; and he reckoned it to him as righteousness” (RSV). Here the term has the meaning of “to be imputed.”
Frequently used in the ordinary sense of “thinking,” or the normal thought processes (Isa. 10:7; 53:4; Mal. 3:16), châshab also is used in the sense of “devising evil plans” (Gen. 50:20; Jer. 48:2). The word refers to craftsmen “inventing” instruments of music, artistic objects, and weapons of war (Exod. 31:4; 2 Chron. 26:15; Amos 6:5).