The Spanish word 'querido' meaning 'beloved' or 'dear' comes from the past participle of the verb 'querer' ('to want, to love'), which itself derives from the Latin verb 'quaerere' meaning 'to seek' or 'to want'. The past participle is formed by adding the suffix '-ido' to the verb stem. Over time, the Latin meaning evolved from simply 'seeking' or 'wanting' to include the stronger emotional sense of 'loving' in Spanish, and the past participle 'querido' came to mean 'beloved' or 'dear' as an adjective.

The most common related Spanish word is the verb 'querer', which is one of the first verbs Spanish students learn. While 'querer' primarily means 'to want' (as in '¿Qué quieres?' - 'What do you want?'), it can also mean 'to love' in certain contexts. This dual meaning helps explain how 'querido' developed its meaning of 'beloved'. Another common related form is 'quiere' (he/she wants/loves), as in 'te quiere' (he/she loves you).

While there aren't many common English words directly related to 'querido', we do have some formal or academic words that come from the same Latin root 'quaerere'. These include 'query' (to ask or question), 'quest' (a search or pursuit), 'inquire' (to ask about), and 'acquire' (to obtain). Notice how all these English words maintain a connection to the original Latin meaning of 'seeking' or 'wanting', though they didn't develop the emotional meaning of 'love' that evolved in Spanish.