Sentence:  Also, the J in JUST RELAX was convenient in that it was <WSD>Scrabbly</WSD> yet off to the side (thus not restricting my options much), though the X in a prime position made the entry a bit of a gamble. 
Meaning of the word marked with <WSD> tags:  Characterized by unusual letters (those that have a high score in the game Scrabble)