ラテン語のpinus, 松, 松かさ, 松脂, PIE*peie, 脂肪, 脂肪, 樹液から。
松。古英語のpinian, torment, painから、語源的にはpain, penalと同じ。
Most of us have wished vaguely & vainly at times that they knew a fir from a pine. As the Scotch fir is not a fir strictly speaking, but a pine, & as we shall continue to ignore this fact, it is plain that the matter concerns the botanist more than the man in the street. [Fowler]