of hair Lack of a tendency to curl.

Polish: prostość

Freedom from crooks or curves or bends or angles.

Trueness of course toward a goal.

synonym: directness.

Roget 246: straightness, rectilinearity^†, directness; inflexibility etc. (stiffness) 323; straight line, right line, direct line; short cut.   

Dutch: directheid

Having honest intentions.

synonym: good faith.

Dutch: goed vertrouwen

A sexual attraction to (or sexual relations with) persons of the opposite sex.

synonyms: heterosexualism, heterosexuality.

Dutch: heteroseksualiteit
Polish: heteroseksualizm, heteroseksualność