1. triangular patch of deposited silt at the mouth of a river formed by its diverging branches   estuary   strait   island   delta   Hint Half-n-half Clue   2. low land between hills or mountains   beach   plain   desert   valley   Half-n-half Clue   3. large area of sea partly surrounded by land   plateau   estuary   valley   gulf   Half-n-half Clue   4. river of ice moving downward very slowly   tributary   glacier   desert   iceberg   Half-n-half Clue   5. part of sea filling wide-mouthed opening of the land   oasis   isthmus   glacier   bay   Half-n-half Clue   6. land jutting out into the sea   desert   valley   cape   delta   Half-n-half Clue   7. narrow strip of land joining two larger land masses   isthmus   harbor   tributary   estuary   Half-n-half Clue