The Spanish word 'ahora' meaning 'now' comes from Old Spanish 'agora', which was formed from two Latin words: 'hac' (meaning 'this' in the ablative case) and 'hora' (meaning 'hour'). The original phrase essentially meant 'at this hour' or 'in this time'. Over time, 'agora' evolved into modern Spanish 'ahora', with the 'g' sound softening and eventually disappearing, a common sound change in Spanish language evolution.

The Spanish word 'hora' (meaning 'hour' or 'time') is directly related to 'ahora', as it comes from the same Latin word 'hora' that forms part of ahora's etymology. You can think of 'ahora' as containing the concept of 'hora' (hour/time) within it, which makes sense given its meaning of 'now' (this current hour/time).

Several English words are related to 'ahora' through the Latin word 'hora'. These include 'hour', 'hourly', and 'horology' (the study of time measurement). The connection becomes clear when you consider that 'ahora' essentially meant 'at this hour' in its origins. You can also see this root in words like 'horoscope' (literally 'hour-watching').