How to Say "readily" in Spanish
The Spanish word for “readily” is “fácilmente” — A2 level. This is a very common word in everyday Spanish.

Examples
Puedes encontrar la información fácilmente en internet.
You can easily find the information on the internet.
Aunque la tarea parecía difícil, la completamos fácilmente en una hora.
Although the task seemed difficult, we easily completed it in an hour.
Debido a su diseño intuitivo, el nuevo software se aprende fácilmente incluso por principiantes.
Due to its intuitive design, the new software is readily learned even by beginners.
The '-mente' Rule
In Spanish, the ending '-mente' is the equivalent of the English '-ly'. It is added to the feminine form of an adjective (fácil is an exception because it is the same for masculine and feminine).
Always Invariable
Since 'fácilmente' is an adverb, it always stays the same. It never changes to match a masculine or feminine noun, or a singular or plural verb.
Mixing Adjective and Adverb
Mistake: “Hizo el ejercicio fácil.”
Correction: Hizo el ejercicio fácilmente. (The adverb 'fácilmente' is needed to describe *how* he did the exercise, not the exercise itself.)
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