1) Crude 2) Indelicate 3) Like oak 4) Vulgar 
• (a.) Having a coarse grain or texture, as wood; hence, wanting in refinement.
referring to qualities of the environment that occur in large patches with respect to the activity patterns of an organism. This results in the organism's ability to select usefully from among qualities (Ricklefs 1970:867) (cf Fine-grained).
referring to qualities of the environment that occur in large patches with respect to the activity patterns of an organism. This results in the organism's ability to select usefully from among qualities (Ricklefs 1979:867) (cf Fine-grained).
referring to qualities of the environment that occur in large patches with respect to the activity patterns of an organism. This results in the organism's ability to select usefully from among qualities (Ricklefs 1979867) (cf Fine-grained). 
Coarse'-grained` (kōrs'grānd`) adjective Having a coarse grain or texture, as wood; hence, wanting in refinement. 
[adj] - not having a fine texture
adjective not having a fine texture; `coarse-grained wood`; `large-grained sand`
Wood with wide conspicuous annual rings in which there is considerable difference between earlywood and latewood. The term is sometimes used to designate wood with large pores, such as oak and walnut.
a rock whose grains (crystals or sediment particles) are roughly pea-sized or larger.
having a coarse texture or grain. · indelicate; crude; vulgar; gross: a coarse-grained person with vulgar manners.