Gratitude
来自Big Physics
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late Middle English: from Old French, or from medieval Latin gratitudo, from Latin gratus ‘pleasing, thankful’.
wiktionary
From French gratitude, from Medieval Latin grātitūdō(“thankfulness”), from Latin grātus(“thankful”).
etymonline
gratitude (n.)
mid-15c., "good will," from Medieval Latin gratitudinem (nominative gratitudo) "thankfulness," from Latin gratus "thankful, pleasing" (from suffixed form of PIE root *gwere- (2) "to favor"). Meaning "thankfulness" is from 1560s.
