Prone to bungling; characterized by clumsiness or ineptitude; likely to result in mistakes or poor execution.
From 'bungle' plus English adjective-forming suffix '-some' (meaning characterized by or prone to), following the pattern of words like 'troublesome' or 'bothersome'.
The suffix '-some' creates adjectives meaning 'prone to' or 'full of'—words like 'dangerous,' 'troublesome,' 'meddlesome'—though 'bunglesome' is rare because 'bungling' serves the same purpose more commonly.
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