Languages › Spanish The Many Ways to Use Spanish "Bajo" in a Sentence Word Conveys Ideas of 'Low' and 'Under' Share Flipboard Email Print La presión sanguínea baja puede ser un signo de enfermedad. (Low blood pressure can be a sign of sickness.). Quinn Dombrowski / Flickr/ CC by SA 2.0 Spanish Grammar History & Culture Pronunciation Vocabulary Writing Skills By Gerald Erichsen Spanish Language Expert B.A., Seattle Pacific University Gerald Erichsen is a Spanish language expert who has created Spanish lessons for ThoughtCo since 1998. our editorial process Gerald Erichsen Updated March 22, 2019 Bajo is a common Spanish preposition, adjective, and adverb that means being low in some way, either figuratively or literally or under something. Also, bajo is used in common idioms usually as a preposition. Bajo Used as an Adjective As an adjective, common translations include "low" or "short," and bajo can also be used to indicate contemptibility or lack of intensity. Spanish Sentence English Translation Mi prima es baja para su edad. My cousin is short for her age. No es necesario tratar esta enfermedad de bajo riesgo con quimioterapia. It is not necessary to treat this low-risk illness with chemotherapy. El valle bajo es rico en historia. The low valley is rich in history. Tenemos problemas de baja calidad de la señal inalámbrica. We have problems with poor quality of the wireless signal. Alberto cayó en los más bajos pecados durante los dos años. Alberto fell into the basest sins during the two years. La clase baja sufre las consecuencias de su reforma política. The lower class is suffering the consequences of his political reform. Son capaces de los más bajos actos de violencia. They are capable of the vilest acts of violence. La presión sanguínea baja puede ser un signo de enfermedad. Low blood pressure can be a sign of sickness. Bajo as an Adverb Although more commonly used as an adjective, bajo can be used as an adverb that means "quietly" or "softly." For example, Si habla bajo, es necesario elevar volumen del micrófono, which means, "If you speak softly, you need to turn up the microphone volume." Another way bajo can be used as an adverb is when describing something falling or flying "low" as in "low to the ground." For example, El pájaro volaba muy bajo, which means, "The bird was flying very low." Bajo as a Preposition Bajo can serve as a preposition and can almost always be translated as "under." Spanish Sentence English Sentence El gato está bajo la cama. The cat is under the bed. La vida bajo el mar es muy difícil. Life undersea is very difficult. Un barco mercante encalló bajo un puente. The merchant ship ran aground under a bridge. Los compresores principales están bajo el coche. The main compressors are under the car. Correr bajo la lluvia es más gratificante que hacerlo en seco. Running in the rain is more rewarding than doing it when it's dry. Bajo Used in Idioms or Borrowed Phrases Bajo can also be a preposition with an indefinite meaning when it is used as an idiom or expression. Many of these figurative expressions correspond to similar ones in English, some of which are likely calques. A calque or loan translation is a word or phrase borrowed from another language by literal, word-for-word translation. Spanish Expression English Translation bajo arresto under arrest bajo circunstancias normales under normal circumstances bajo condición de que under condition that bajo construcción under construction bajo control under control bajo cubierto undercover bajo fianza on bail bajo la influencia under the influence bajo investigación under investigation bajo juramento under oath bajo la mesa under the table bajo ningún concepto in no conceivable way bajo palabra on parole bajo peso underweight bajo presión under pressure bajo protesta under protest Words Related to Bajo Bajar, is a related verb to bajo, which often means "to lower" or "to get down." Related adverbs are abajo and debajo, which often mean "underneath," or "down there." Introduction to Spanish Prepositions 10 Facts About Spanish Prepositions Using ‘Después’ in Spanish Introduction to Spanish Adverbs Translating 'That' in Spanish Creating Adverbs by Adding '-mente' to Adjectives Translating ‘As’ to Spanish Using the Spanish Preposition 'A' How To Use Adverbial Phrases in Spanish Using ‘Tal’ in Spanish Using the Spanish Preposition 'En' Using 'Malo,' 'Mal' and Related Words in Spanish Many Uses for the Preposition ‘Con’ in Spanish Using the Spanish ‘A’ for Reasons Other Than Indicating Motion How To Use the Spanish Preposition ‘De’ How to Use the Spanish Word "Según"