Comparative form of 'groaty'; more resembling grout, or more filled with grout than something else.
From 'groat' or 'grout' plus comparative suffix '-ier'. Follows standard English comparative adjective formation for words ending in '-y'.
Builders use 'groutier' to describe mortar that has more grout consistency—it's technical language that matters because the ratio of grout to other materials determines whether your tile work will last centuries or crack in years.
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