مَرْحَبًا • (marḥaban)
From Arabic مَرْحَبًا (marḥaban).
مرحبا • (merhaba)
From the root ر ح ب (r-ḥ-b); related to the verb رَحِبَ (raḥiba, “to be wide”). (The verb رَحَّبَ (raḥḥaba, “to make welcome, to receive graciously”) is derived from this term.)