Sentence:  Considering the sea as <WSD>placeful</WSD> allows going beyond substantialism in the analysis of mobilities. Indeed, rather than a product of the interactions between existing fixed entities (such as ship, sailors, goods), the <WSD>placeful</WSD> sea is itself an entity produced or performed by the continuous interactions of actors, nature and ideas and is therefore continuously defined and redefined (relationalism). 
Meaning of the word marked with <WSD> tags:  Forming a well-defined place; acting as an identifiable location.