Using neuter article Lo + adjective + ser in Spanish

Learn about the Spanish neuter article "lo"

In Spanish there is a neuter article, "lo", that can be used with adjectives (not nouns) in a neutral way. For example:

With lo we express "things that are of a certain characteristic". 

We can also use it to highlight a quality about something/someone.

Have a look at the following examples with:

It is only possible to use the masculine singular form of the adjective when we highlight the quality of the person or thing we are referring to.

This structure is often used with verb ser:

Notice how lo, used with this type of construction, is always followed by singular masculine adjectives, not the feminine or plural.

 You can also add "de":

Notice above how comparative adjectives can also be used (mejor, peor, etc).

Following the same structure, it can be used with a superlative:

Notice how, sometimes despite using the singular "lo + adjective" (lo menos caro), we conjugate the verb in the plural form (son). This is because, being a neutral idea, it can refer to a group of things, i.e "The least expensive things..."

See also How to say the most / the least + adjective in Spanish (superlatives).