The Spanish word 'antisocial' combines two ancient elements: the Greek prefix 'anti-' meaning 'against' or 'opposite,' and the Latin-derived word 'social'. The Latin part comes from 'socius' meaning 'companion' or 'ally', which developed into 'socialis' meaning 'social' or 'sociable' with the addition of the suffix '-al' (meaning 'relating to'). This combination literally creates a word meaning 'against being social' or 'opposite of sociable.'

The simpler and more common Spanish word 'social' is directly related to 'antisocial', being its base word. While 'social' refers to someone or something relating to society or companionship, 'antisocial' adds the 'anti-' prefix to create its opposite meaning.

English speakers will find this word very familiar as English uses the identical word 'antisocial' with the same meaning. Other related English words include 'social', 'society', 'socialize', and 'associate' - all stemming from the same Latin root 'socius'. The word 'sociology' (the study of society) is another common related term.