Full of gashes; characterized by many deep cuts or wounds.
From 'gash' plus the productive suffix '-ful' meaning 'full of,' a standard English word-formation pattern that declined in use over the 19th century.
Words ending in '-ful' were extremely productive in older English, but 'gashful' never caught on because writers preferred 'gashed' or simply describing wounds directly—showing how some word combinations fail despite being grammatically correct.
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