inkling

From Middle English ningkiling, nyngkiling (“hint, slight indication; mention, whisper”), and then either: * possibly a variant of nikking, nyckyng (“hint, slight indication; mention, whisper”), possibly from nikken (“to mark (a text) for correction (?)”) + -ing, -inge (suffix forming gerunds from verbs); or * more likely from the rebracketing of an inklyng as a ninkiling, from Middle English inklen (“to mention (in a low voice); to tell (the truth)”) [and other forms] + -ing, -inge; inklen may be derived from inca, inke (“dread, fear; doubt; danger, risk (?)”), from Old English inca (“doubt, uncertainty; suspicion; fear; cause for complaint, grievance, grudge, ill-will, offence; quarrel; occasion, opportunity”), from Proto-Germanic *inkô (“ache; grief; regret”), from Proto-Indo-European *h₁eng-, *yenǵ- (“illness”). The English word would then be analysable as inkle + -ing. Sense 3 (“desire, inclination”) may have been influenced by incline (“to tend to believe or do something”) or French enclin (“inclined, prone”).

来源：wiktionary