While the ocean is wide, the trench may be far from continental sources of sediment and so may be deep. As continents approach each other, the trench can fill with continental sediments and become shallower.
Definition of blunt. 3a : abrupt in speech or manner She tends to be blunt. a blunt refusalb : being straight to the point : direct To be perfectly blunt, I don't think he can do it.
Blunt force trauma: Injuries resulting from an impact with a dull, firm surface or object. Individual injuries may be patterned (eg ,characteristics of the wound suggest a particular type of blunt object) or nonspecific.