The Spanish word 'marina' comes from the Latin word 'marinus' meaning 'of the sea'. The Latin 'marinus' itself was formed by combining two parts: the root 'mare' meaning 'sea' and the suffix '-inus' meaning 'belonging to'. So literally, 'marina' means something that belongs to or is related to the sea.

Several common Spanish words share this maritime root, including 'mar' (sea), 'marinero' (sailor), and 'marítimo' (maritime). All these words preserve the basic connection to the sea and naval activities.

English speakers might recognize the connection to words like 'marine', 'maritime', 'submarine' (under the sea), and 'mariner' (sailor). The word 'marina' itself exists in English with the same meaning as in Spanish - a dock or harbor for pleasure boats. All these words share the same Latin ancestor 'mare' meaning 'sea'.