Ah. Figure of speech Ecphonesis. Note the four exclamatory descriptions, and see note on "gone away", below.
sinful. Hebrew. chata. App-44.
sinful nation. Note the Figures of speech Apostrophe, Synonymia and Anabasis in verses: Isaiah 1:4; Isaiah 1:5. Contrast Exodus 19:6; Deuteronomy 7:6; Deuteronomy 14:2; Deuteronomy 14:21.
laden. heavily burdened.
iniquity. Hebrew 'avah. App-44.
of. consisting of. Genitive of Apposition. App-17.
corrupters. Reference to Pentateuch (Deuteronomy 32:5).
forsaken. Apostasy in disposition. Reference to Pentateuch (Deuteronomy 28:20; Deuteronomy 31:16). App-92. Occurs in the "former" portion here, Isaiah 1:28; Isaiah 6:12; Isaiah 7:16; Isaiah 10:3 (leave), 14 (left); Isaiah 17:2; Isaiah 17:9; Isaiah 18:6 (left); Isaiah 27:10; Isaiah 32:14, and in the "latter" portion, Isaiah 41:17; Isaiah 49:14; Isaiah 54:6; Isaiah 55:7; Isaiah 58:2; Isaiah 60:15; Isaiah 62:4; Isaiah 62:12; Isaiah 65:11. App-79.
the Hebrew. Jehovah. (with 'eth). Jehovah Himself (App-4). Not the same as in verses: Isaiah 1:2; Isaiah 1:9; Isaiah 1:10; Isaiah 1:20.
provoked. despised, blasphemed. Reference to Pentateuch (App-92). An old Mosaic word (Numbers 14:11; Numbers 14:23; Numbers 16:30; Deuteronomy 31:20). Apostasy in words (see note above).
the Holy One of Israel. Occurs twenty-five times in Isaiah: twelve times in the "former" portion (Isaiah 1:4; Isaiah 5:19; Isaiah 5:24; Isaiah 10:20; Isaiah 12:6; Isaiah 17:7; Isaiah 29:19; Isaiah 30:11; Isaiah 30:12; Isaiah 30:15; Isaiah 31:1; Isaiah 37:23,:); and thirteen times in the "latter" portion (Isaiah 41:14; Isaiah 41:16; Isaiah 41:20; Isaiah 43:3; Isaiah 43:14; Isaiah 45:11; Isaiah 47:4; Isaiah 48:17; Isaiah 49:7; Isaiah 54:5; Isaiah 55:5; Isaiah 60:9; Isaiah 60:14). Outside Isaiah it is used by Himself once (2 Kings 19:22 first occurrence); three times in the Psalms (Isa 71:22. Isa 89:18).
gone away backward. Apostasy in act. See note on Isaiah 1:4, and notice the threefold apostasy in this verse.