To this day is an expression used to refer to something that has been true or has remained the same SINCE a certain time in the past. It is often used to emphasize the longevity of a situation. The crossword solutions for this term are STILL, SINCE, and YET. STILL is an adverb meaning up to the present time or even now. SINCE is a preposition indicating a point of time in the past from which something continues up to the present. YET is an adverb meaning up to the present time or even now, but with the added connotation of surprise or contrast.