The Greek word βάλτος
Word βάλτος
b a l t o ς
IPA baltoς
Meaning swamp
See also Early Proto-Albanian: *baltā ‘swamp, marsh, dirt, earth’
Illyrian: *bolto ‘swamp’

Other words that might be of interest
φλύζω ‘to flow, to overflow’, εμπότης ‘water jar, urn’, θάλασσα ‘sea’, ύδωρ ‘water’, πόντος ‘sea’, αχελώος ‘name of a river, water’, ῥέω ‘to flow’, ξηρό ‘dry’