Most of the time, words ending in "o" are masculine. However, there are exceptions to this, as in "la mano", the hand. Many masculine words fall in other categories. The best way to know "gender" of a word is to remember the "el" or "la" when you learn the word.
Masculine. Normally, nouns that end in O in Spanish are masculine.
The Spanish word "castillo" is masculine.
The Spanish word "cielo" is masculine.
The Spanish word "salón" is masculine.
el teclado(masculine)
Masculine. You say "el dia"
masculine it means shoulder
Brazo means arm in Spanish. El brazo is masculine, la brazo is feminine.
Clock in spanish is translated to "reloj". Reloj is a masculine word.
It's masculine - "el dinero"
The Spanish word "quesos" is masculine.
"In Spanish, the word 'botón' is masculine."