smile
The German word for smile is 'Lächeln'. It is a noun and can be used in the same way as in English. For example, 'She gave him a warm Lächeln' or 'His Lächeln lit up the room'. It is important to note that the verb form of 'to smile' in German is 'lächeln'. For example, 'He lächelt' means 'He is smiling'.
She has a beautiful smile.
In this sentence, 'Lächeln' is used as a noun in accusative case describing the smile of a woman. 'Schönes' is the adjective, which inflects according to the noun's gender, plurality and case.
Smiling makes you more attractive.
The noun 'Lächeln' is used in this sentence in a more general sense, referring to the act of smiling. 'Macht' represents a third-person singular form of the verb 'machen' meaning 'to make' or 'to do'.
Always keep your smile.
In this sentence, 'Lächeln' is a direct object in the accusative case. 'Behalte' is a command form of the verb 'behalten', which means 'to keep'. The word 'immer' serves as an adverb modifying the verb.