schedule

“Home in” is the older phrase for moving toward a target or narrowing focus. “Hone in” came later and is now widely used.

Earlier English had no fixed spelling, so through appeared in many forms. Printing and dictionaries gradually helped standardize it.

“Keep your powder dry” began as literal military advice. Today it means staying prepared, especially for risk, trouble, or sudden action.

“Doubting Thomas” comes from the apostle Thomas in the Bible, who wanted proof before believing Jesus had risen from the dead.