The Spanish word 'hambre' (meaning 'hunger') comes from the Latin word 'fames', which also meant 'hunger'. The word evolved through Vulgar Latin as 'famen' and its accusative form 'faminem'. In Old Spanish, it first appeared as 'famne' and then changed to 'fambre'. Finally, the initial 'f-' sound changed to 'h-', which was a common sound change in the development of Spanish from Latin, giving us the modern Spanish word 'hambre'.

This evolution shows several typical sound changes in Spanish's development: the addition of a supporting vowel '-e' to make the word easier to pronounce, the insertion of a 'b' sound between 'm' and 'r' (which happened in many Spanish words), and the characteristic Spanish change of initial 'f-' to 'h-' that we see in many Spanish words.

A common related Spanish word is 'hambriento' (meaning 'hungry'), which is directly derived from 'hambre'. Another related word is 'hambrienta' (the feminine form of 'hungry'). The verb 'hambrear' meaning 'to starve' or 'to make hungry' is also derived from this root.

While English 'hunger' is not related to Spanish 'hambre', English borrowed some words from the same Latin root 'fames'. These include 'famine' (a severe shortage of food) and 'famished' (extremely hungry). You can see how these English words preserved the original 'f-' sound from Latin, while Spanish changed it to 'h-'.