The Spanish word 'friki' comes from English 'freaky', which itself derives from 'freak'. Going even further back, 'freak' evolved from the Old English word 'frician', meaning 'to dance'. Over time, the meaning shifted from movement to describing something unusual or strange, and eventually to describing people who were considered different from the norm.

In modern Spanish, 'friki' is used to describe someone who is obsessed with a particular hobby or interest, especially related to pop culture, science fiction, or technology. It can also describe someone who is considered strange or eccentric, similar to how 'freaky' is used in English, though often with a more endearing connotation in Spanish usage.

'Friki' is a relatively recent borrowing from English into Spanish, and as such, there aren't any simpler or more common Spanish words that share its etymology. It stands alone as a modern addition to Spanish vocabulary that reflects the growing influence of English and global pop culture on the Spanish language.

The Spanish 'friki' is closely related to several common English words that students will recognize: 'freak', 'freaky', and 'freakish'. While 'freak' can be used negatively in English to describe someone strange or unusual, 'friki' in Spanish has evolved to have a more specific and often more positive connotation, usually referring to someone who is enthusiastically devoted to their interests or hobbies. This shift from a potentially negative term to a more neutral or positive one is a interesting example of how borrowed words can take on new meanings in their adopting languages.