‘Peninsulate’

If 'insulate' is a word, from the Latin insula, insulae, island, then why not 'peninsulate,' v. i. meaning to insulate partially?  Example featuring an adjectival cognate:

His is a peninsular life, a balanced life, neither continental not insular. While connected to the mainland of the traditional, the quotidian, and the commonsensical, a part of him stretches out into the oceanic Apeiron.

Does your mother look askance at your new boyfriend? Perhaps the above sentence will take the edge off her disapprobation.