In a sport where statistics tell so much of the story, toughness remains one of the true unquantifiable measurements in basketball.
It is not just the difference between sitting out a game and battling through pain - the qualities of toughness present themselves in many unexpected circumstances throughout an NBA season.
But there is also a tightrope to navigate between being tough and being dirty.
Big Read: The Steven Adams Effect
Very few define toughness and its quandaries as well as Steven Adams, who has been plastered with all the labels given to players involved in multiple confrontations. Tough, dirty, sneaky, gritty, pesky, a pest, an aggravator - Adams has been called them all in a career which has been synonymous with physical moments.