From Japanese-English FreeDict Dictionary ver. 0.1:
懇ろ /ɽˈo̞/, (irregular okurigana usage) 懇 /(en)tʃˈaɪniːz(ja)lˈe̞tə/, ねんごろ /ne̞ŋɡˈo̞ɽo̞/, (out-dated or obsolete kana usage) ねもころ /nˌe̞mo̞kˈo̞ɽo̞/
1. (adjectival nouns or quasi-adjectives (keiyodoshi))
kind, courteous, hospitable, warmly respectful
2. 懇ろになるintimate
3. (noun (common) (futsuumeishi))
(noun or participle which takes the aux. verb suru)
Note: archaismbecoming intimate, having an intimate relationship (sometimes esp. a homosexual relationship)