Neuter of a presumed derivative of the alternate of echo as adverb; nigh, i.e. Nearly -- almost.
see GREEK echo
1. near, hard by.
2. from Sophocles down (of degree, i. e.) well-nigh, nearly, almost; so in the N. T. three times before πᾶς: Acts 13:44; Acts 19:26; Hebrews 9:22 (but see Winers Grammar, 554 (515) n.; (R. V. I may almost say)); (2 Macc. 5:2; 3Macc. 5:14).