The word "sería" in Spanish is a conditional conjugation of the verb "ser", which basically means "to be" and can mean either "he would be", "I would be", or less commonly "you (formal) would be". The use of this word in the second person implies respect or a higher social status than the speaker.
Without the accent, "seria" is just an adjective meaning "serious."
"quidera" is not a Spanish word.
alico is not a Spanish word.
quest is not a Spanish word.
I think what you mean is "What is the Spanish word for let?" because the word "let" is an English word, not Spanish. The Spanish word for "to let" is permitir. "Let me" is "permítame."
There is no Spanish word "esay." Perhaps you mean "ese" or "esa"? Both of those words mean "that."
"Seres humanos" is the Spanish term for "human beings" or "human beings." It refers to individuals of the human species.
There are a couple of Spanish words similar to this one, but no such Spanish word. One is 'seres' which means beings. There is another one, seréis, which means you all[familiar] will be. Then there's serios which is an adjective that means serious [pl., masc.].
Todos los seres vivos.
dog
afuras is not a spanish word.
gaka is not a Spanish word
"quidera" is not a Spanish word.
"Coll" is not a Spanish word.
It is the Spanish word for "fox".
The word for "after" in Spanish is "después".
That's not a Spanish word.
alico is not a Spanish word.