Andar vs. caminar

The Spanish words 'andar' and 'caminar' both mean 'to walk', but they are used differently and can convey different nuances.

Andar

'Andar' generally means 'to walk' or 'to move', but it is also used in a broader sense to indicate general movement or functioning.
Me gusta andar por el parque todas las mañanas.
(I like to walk through the park every morning.)
La máquina anda perfectamente.
(The machine works perfectly.)
Andar en bicicleta es muy divertido.
(Riding a bicycle is very fun.)
¿Cómo andas últimamente?
(How have you been lately?)

Caminar

'Caminar' specifically means 'to walk' with the focus on the action of walking using one's feet. It is more often used in contexts where walking as physical activity is emphasized.
Vamos a caminar por la playa al atardecer.
(Let's walk on the beach at sunset.)
Caminar es una buena forma de ejercicio.
(Walking is a good form of exercise.)
Tiene que caminar más para mejorar su salud.
(He needs to walk more to improve his health.)
Ayer caminé hasta la casa de mi amigo.
(Yesterday, I walked to my friend's house.)

Summary

'Andar' and 'caminar' both translate to 'to walk', but 'andar' has a broader meaning, encompassing general movement and functioning, while 'caminar' focuses specifically on the physical act of walking. Both terms are useful in different contexts and help enrich the Spanish language by providing nuanced options for expression.