It is a phobia of the sea, of large expanses of water. It is a word of Greek components: 952; 945; 955; 945; 963; 963; 945; ( thalassa "sea" ) 966; 959; 946; 959; 962; ( fovos "fear") . See potamophobia, pleophobia, hydrophobia, dinophobia, napathy, thalase.