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The form "library's" is the possessive form in English, not the plural form. The possessive form would have a noun after it that belongs to the library, for example "I like to talk about the library's books."
The plural form of "library" in English is "libraries". The ending y changes to i and you add es, so "pony" becomes "ponies" and "city" becomes "cities" when there is more than one. Most English words form the plural by just adding s, so "cat" becomes "cats" and "house" becomes "houses".
In Danish if a word ends in s, then the plural is formed by adding an apostrophe, but in English a word that ends in s adds es for the plural, for example "a glass" becomes "glasses" for more than one. In English, words that end in sh or ch or x or z also add es to become plural.
You can also look up a word in a dictionary to find its singular and plural forms.
Generally, Spanish voiced plosives (so the letters b/v, d, and g) have two modes of articulation, based on what comes before them. If the letter is spoken after a pause or after the letters 'm' or 'n', it will be pronounced as a plosive, so like the [b], [d], or (hard) [g] that you know from English.
In all other situations, and especially after a vowel, these sounds are pronounced as fricatives. It'll be like 'b', 'd', or 'g', but with a little gap, with some air escaping. That will sound similar to the English /v/ sound for the letters 'b' and 'v' (IPA symbol of the exact sound: [β]). For the letter 'd', it sounds like a voiced 'th', like in "this" (IPA: [ð]). For 'g' it's a sound that doesn't appear in English. It sounds a bit like a throaty 'r' (IPA: [ɣ]).
So, universidad should be pronounced with two voiced 'th' sounds, the latter usually pronounced very softly. In English approximation: oo-nee-ver-see-THUH.
Jenna, universidad is a noun describing an concept, like all other nouns that end with '-dad' or '-tad', and conversely with '-ty' in English. Concept nouns are all feminine in Spanish:
- la seguridad - the security
- la ciudad - the city
- la posibilidad - the possibility
- la amistad - the friendship
No, the plural of "library" is "libraries". https://www.merriam-webster.com/dictionary/library
It is the same in English. I can have a library at home, from which I do not necessarily loan books. I also go to the county library and the university library which both do loan books. Many words have more than one meaning and some words have very different meanings. This word is not so bad. Which language are you, ekihoo, used to that is more specific?