If you do something ______, you do it in a serious, heartfelt way. You might ______ promise your friend that you'll never forget her birthday again, or ______ ask your grandmother if there's anything you can do to help her out while she's recovering from surgery. If you ______ study for your upcoming French exam, it means you're really buckling down to learn those vocabulary words. The Old English root of ______ is eornost, which means "seriousness or serious intent."