[ pɪ'nɪnsjʊlə ]
■ noun a long, narrow piece of land projecting out into a sea or lake.
Derivatives
~r adjective
Origin
C16: from L. paeninsula , from paene 'almost' + insula 'island'.
Usage
Do not confuse the spellings ~ and ~r . Peninsula is a noun ( the end of the Cape Peninsula ), whereas ~r is the adjectival form ( the ~r part of Malaysia ).