Satisfy (4)
'satisfy' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for sate that I've seen before include "Satisfy to excess" , "Supply to excess" , "Provide with more than enough" , "Make content" , "Indonesian food" .)
'satisfy' is the definition.
(pleasing is a kind of satisfying)
This is all the clue.
(Other definitions for please that I've seen before include "Asleep (anag)" , "See 10 Across" , "Satisfy aesthetically" , "Polite word of request" , "Satisfy or gratify" .)
'satisfy' is the definition.
(synonyms)
This is all the clue.
(Other definitions for fulfil that I've seen before include "Satisfy, requirements say" , "Complete, satisfy" , "Make to come true, say a prophecy" , "Bring about completion of" , "Bring to fruition, accomplish" .)
'satisfy' is the definition.
(as in slaking one's thirst)
This is all the clue.
(Other definitions for slake that I've seen before include "Quench (one's thirst)" , "Satisfy one's thirst" , "Assuage" .)
'satisfy' is the definition.
(sufficing is a kind of satisfying)
This is all the clue.
(Other definitions for suffice that I've seen before include "Be enough" , "Be adequate" , "Serve - do" .)