the portion of a brush pen held in the hand / a penis / the hilt of a sword or knife, or the grip of a bow or staff

the nock on either end of a bow where the bowstring rests / a bent nail or other kind of spike attached to or driven through an iron staff or a truncheon to make the weapon more dangerous

a tenon, as in a mortise and tenon carpentry join / (slang) a penis

Visualization. / Visual control: a business management technique whereby information is communicated using visual signals in order to facilitate quick understanding or increase efficiency and clarity.

Mongolia

a house

house of something, place where some business is conducted / person who does that thing

a house / one's house

a house

an expert, professional, performer