freehand

[ free-hand ]

/ ˈfriˌhænd /

drawn or executed by hand without guiding instruments, measurements, or other aids: a freehand map.

in a freehand manner: to draw freehand.

Origin of freehand

First recorded in 1860–65; free + hand

It may be necessary to draw the lily first before cutting, but the freehand cutting is a good exercise.

Home Occupations for Boys and Girls |Bertha Johnston
His Studies, avowedly classed as exercises of dexterity, stand to those of other writers as pictures to freehand drawing.

Studies in Modern Music, Second Series |W. H. Hadow
The stiffness of the lines and circles reminds one more of ruler and compass than of the freehand work of prehistoric artists.

The Clyde Mystery |Andrew Lang
At the same time, a knowledge of this rigid perspective is the sure and unerring basis of his freehand drawing.

The Theory and Practice of Perspective |George Adolphus Storey

But the diagonal lines necessary for sectional parts may be done rapidly, though neatly, by freehand if necessary.

An Introduction to Machine Drawing and Design |David Allan Low