How to Say "penetration" in Spanish
The Spanish word for “penetration” is “penetración” — B1 level. This is a very common word in everyday Spanish.

Examples
La penetración de la lluvia en el suelo es vital para las plantas.
The penetration of rain into the soil is vital for plants.
La empresa busca una mayor penetración de mercado este año.
The company is looking for greater market penetration this year.
Su análisis del problema mostró una gran penetración psicológica.
His analysis of the problem showed great psychological insight.
The '-ción' Gender Rule
Almost all Spanish words ending in '-ción' are feminine. You should always use 'la' or 'una' with this word (e.g., la penetración).
Using the Accent Mark
This word has an accent on the 'o' because it is an 'aguda' word (stressed on the last syllable) and ends in 'n'.
The Plural Trap
Mistake: “las penetraciónes”
Correction: las penetraciones (without the accent mark). When you make a word ending in '-ción' plural, the accent mark is no longer needed because the stress naturally stays on the same syllable.
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