Synonyms:
flatten
Meaning: make flat or flatter; "flatten a road"; "flatten your stomach with these exercises"
Synonyms:
flatten, flatten_out
Meaning: become flat or flatter; "The landscape flattened"
Usage examples
Powder-horn, to make.--Saw off the required length from an ox's horn, flatten it somewhat by heat (see "Horn"), fit a wooden bottom into it, caulk it well, and sew raw hide round the edge to keep all tight.