Moil has multiple meanings depending on the context. Here are some definitions from various sources:

• Merriam-Webster: Moil may mean "to work hard" but its origins are the opposite of hard; it ultimately derives from Latin mollis, meaning "soft." It can also mean "to make wet or dirty".

• Dictionary.com: Moil means "to work hard; drudge" or "to whirl or churn ceaselessly; twist; eddy".

• Collins Dictionary: Moil means "to moisten or soil or become moist, soiled, etc" or "to toil or drudge".

• YourDictionary: Moil can mean "drudgery; hard work" or "confusion; turmoil." In glassblowing, it refers to the excess material which adheres to the top, base, or rim of a glass object when it is cut or knocked off from a blowpipe or punty, or from the mold-filling process.

In summary, moil can mean to work hard, to make wet or dirty, to whirl or churn ceaselessly, or to moisten or soil. In glassblowing, it refers to the excess material left on a blown object.