From en- + dear.
endear (third-person singular simple present endears, present participle endearing, simple past and past participle endeared)
- (obsolete) To make (something) more precious or valuable. [16th-17th c.]
- (obsolete) To make (something) more expensive; to increase the cost of. [17th-19th c.]
- (obsolete) To stress (something) as important; to exaggerate. [17th c.]
1603, Michel de Montaigne, chapter 18, in John Florio, transl., The Essayes […], book II, London: […] Val[entine] Simmes for Edward Blount […], OCLC 946730821: Salvianus Massiliensis […] saith, that amongst French-men, to lie and forsweare is no vice but a manner of speach. He that would endeare [transl. encherir] this Testimonie, might say, it is now rather deemed a vertue among them.
- To make (someone) dear or precious. [from 18th c.]