ᠮᡝᡩᡝᡵᡳ (mederi, “sea”) + ᡨᡠᠯᡝᡵᡤᡳ (tulergi, “outside”). Calque of Chinese 海外 (hǎiwài).
ᠮᡝᡩᡝᡵᡳᡨᡠᠯᡝᡵᡤᡳ • (mederi tulergi)