Stinking is the present participle of 'stink' (Old English 'stincan', to emit a smell, originally of any odour), used adjectivally. Important recorded forms include stincan (Old English). Morphologically, the ending or combining element adapts the older base to the present English part of speech while keeping the historical sense visible. The semantic development is already visible in the history: an older concrete or specialized use was extended into the modern meaning rather than replaced by a separate origin. In current use it covers having a strong foul smell; also used as an intensifier. The wider family includes derived forms such as stinkingly and related words such as stink, stench, and stinker.