Appoggio vs. sostegno vs. supporto

The Italian words 'appoggio', 'sostegno', and 'supporto' all relate to the concept of support, but they have subtle differences in usage and connotation.

Appoggio

'Appoggio' typically refers to moral or political support, often implying a temporary or specific backing for a cause or person.
Il candidato ha ricevuto l'appoggio del partito.
(The candidate received the party's support.)
Cerco il tuo appoggio in questa decisione difficile.
(I'm seeking your backing in this difficult decision.)

Sostegno

'Sostegno' often indicates a more substantial and ongoing support, frequently used in contexts of financial aid, emotional support, or assistance for those in need.
Il governo ha promesso sostegno alle famiglie in difficoltà.
(The government has promised support to families in need.)
Il sostegno dei miei amici mi ha aiutato a superare un momento difficile.
(The support of my friends helped me get through a difficult time.)

Supporto

'Supporto' is the most versatile term, often used for practical or technical support, as well as general assistance or backing in various contexts.
L'azienda offre un ottimo supporto tecnico.
(The company offers excellent technical support.)
Abbiamo bisogno di supporto finanziario per questo progetto.
(We need financial support for this project.)

Summary

While 'appoggio' is often used for moral or political backing, 'sostegno' implies more substantial and ongoing support, and 'supporto' is versatile, covering various types of practical and general assistance. The choice between these words depends on the specific context and the nature of the support being described.