The term 'very old' can be described by several crossword solutions, such as 'AGED' (4 letters), 'ANTIQUE' (7 letters), 'PREHISTORIC' (11 letters), 'HOARY' (5 letters), 'ANCIENT' (7 letters), 'ARCHAIC' (7 letters), and 'triassic' (8 letters). AGED refers to something that is very old, ANTIQUE is an old object that is valuable due to its age, PREHISTORIC means something that existed before recorded history, HOARY is an old word for gray or white hair, ANCIENT is something that is very old, ARCHAIC is something that is old-fashioned, and triassic is a period of time in the Mesozoic era.