Like most of the words in my Lexicon, today's word is a classic that's fallen into obscurity. It's one that I've never used before today, and I hope to make it a part of my vocabulary for the future. In fact, you could even say that I'm Fain to do it! Fain (fayne) is an old English word that means "Pleased or willing under the circumstances," "Gladly," or "Compelled by the circumstances; obliged." It comes from the Old English fægen (happy, glad, or well pleased) which is related to the Old Norse fegiun (happy) and the Old High German gifehan (to be glad). Depending on the context, Fain can be both an adjective and an adverb. Some examples might include:
"After a night in the dog crate, Sasha was fain to run across the yard in freedom."
"After playing in the dirt all day, the children were fain to take a bath before dinner."
"You will find that your trust was not given in vain, for no one loves you as well as I, and no one is so fain to help you."
(The Memoirs of Cassanova Complete)
"Despite his reservations, Joey was fain to give half of his earnings to his younger brother for helping with his chores."
As you can see, Fain is quite easy to add to your writings. Plug it in wherever you need to express willingness, gladness, or obligation.
To learn more, check out these links that I'm Fain to give you! Vocabulary.com, Dictionary.com, Merriam-Webster, Oxford Dictionary, Online Etymology. The photo is my own.