Simple past tense and past participle of trowel.(verb)
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Use "trowelled" in a sentence
"However there is a small modern movement happening as well, with the Micro Compact Home, and we certainly have trowelled on the pixels for the Sustain Minihome."
"Ming looked half asleep and someone had obviously trowelled the makeup on."
"The building itself is an ornate adventure in nineteenth century architecture; three storeys of rambling brick trowelled into six hectares of stunning restored gardens."