From im and 'el with a pronominal suffix inserted; with us (is) God; Immanuel, a type name of Isaiah's son -- Immanuel.
see HEBREW im
see HEBREW 'el
H6005. Immanuel
עִמָּנוּאֵל proper name, masculine Immanuel (with us is God); — ׳י Isaiah 7:14 van d. H. Baer; אֵל עִמָּנוּ Gi; — name of child, symbolizing presence of ׳י to deliver his people (on interpret. see Commentaries) — אֵל עִמָּנוּ 8:8, 10 is declaration of trust and confidence, with us is God ! (compare Psalm 46:8; Psalm 46:12); see עִם.