This is the 4716th most frequent Spanish word.
comprarlo
"Comprarlo" means "to buy it" in English.
Here 'comprarlo' combines 'comprar' (to buy) with the pronoun 'lo' (it), formed to express the intention to purchase 'it', which could refer to a masculine singular object.
Quiero comprarlo ahora mismo.
I want to buy it right now.
In this sentence, 'comprarlo' follows the verb 'decidí' (I decided) to continue with the action directed toward the masculine singular object.
Lo encontré en la tienda y decidí comprarlo.
I found it in the store and decided to buy it.
'Comprarlo' here functions as an infinitive verb with an attached pronoun ('lo') to indicate the hypothetical action of buying the masculine singular object in a conditional clause.