Tied down is a term used to describe the act of restraining something or someone. This can be done in various ways, such as securing, tethering, or lashing. SECURE is a 6 letter word meaning to make something safe and protected. TETHERED is an 8 letter word meaning to attach something to a fixed point. Secured is a 7 letter word meaning to fasten something firmly in place. Lastly, LASHED is a 6 letter word meaning to tie or bind something with rope or cord.