Sentence:  A model category is called pointed if the initial object and terminal object are the same. The homotopy category of any pointed model category acquires a <WSD>suspension</WSD> functor denoted by \Sigma. It turns out that \text{Ho}(M) is a pre-triangulated category in a natural waynb.... When the <WSD>suspension</WSD> is an equivalence, M is called a stable model category, and in this case \text{Ho}(M) becomes a triangulated categorynb.... 
Meaning of the word marked with <WSD> tags:  A function derived, in a standard way, from another, such that the instant function's domain and codomain are suspensions of the original function's.