Family vocabulary is one of the first building blocks of any language. In German, immediate family members include die Mutter (mother, plural die Mütter), der Vater (father, plural die Väter), der Bruder (brother, plural die Brüder), and die Schwester (sister, plural die Schwestern). You can build longer sentences by combining these words, for example "Ich habe eine Schwester und zwei Brüder" (I have a sister and two brothers), where "eine" is the feminine accusative form of "ein." The extended family includes die Großmutter (grandmother, informally die Oma) and der Großvater (grandfather, informally der Opa), as well as der Onkel (uncle) and die Tante (aunt). The next generation is covered by der Sohn (son, plural die Söhne) and die Tochter (daughter, plural die Töchter).
Vocabulary for parts of the body is essential for describing health, clothing, and everyday situations. The major body parts are der Kopf (head), der Arm (arm, plural die Arme), das Bein (leg, plural die Beine), die Hand (hand, plural die Hände), and der Fuß (foot, plural die Füße, with the special ß character pronounced like "ss"). The face includes das Auge (eye, plural die Augen), das Ohr (ear, plural die Ohren), die Nase (nose, plural die Nasen), der Mund (mouth), and der Zahn (tooth, plural die Zähne). These words come up in common phrases like "Mein Kopf tut weh" (My head hurts), "Wasch dir die Hände" (Wash your hands), and "Ich putze mir die Zähne" (I brush my teeth).
German body-part nouns each take one of the three grammatical articles, and noticing these patterns helps you remember them. Many plurals follow predictable patterns by adding -e or -en, but some use umlauts (Brüder, Mütter, Väter, Füße, Zähne) and others are entirely irregular (Augen, Ohren). Building familiarity with both family and body vocabulary gives you the tools to talk about yourself and the people around you in detail, while reinforcing how articles and plurals work in German.