The Collaborative International Dictionary
Peninsulate
Peninsulate \Pen*in"su*late\, v. t. [imp. & p. p. Peninsulated; p. pr. & vb. n. Peninsulating.] To form into a peninsul
South River . . . peninsulates Castle Hill farm.
--W. Bentley.
Wiktionary
peninsulate
vb. (context transitive English) To make into a peninsula; to surround with water.
Usage examples of "peninsulate".
It was situated on a piece of land entirely surrounded by water, yet peninsulated by a rustic bridge which joined it to the walk.