las sustancias nocivas
“las sustancias nocivas” — harmful impurities in Spanish. Phrase, level B1. Nocivo is harmful to health. An additive mixed in on purpose is el aditivo. In a live sentence: “El humo lleva sustancias nocivas” — The smoke carries harmful impurities. You can hear how it sounds right here. A word from the everyday Spanish course, level B1.
In short
| Written in Spanish | las sustancias nocivas |
| Translation | harmful impurities |
| Part of speech | phrase |
| Level | B1 |
- las sustancias nocivasharmful impurities
Why it looks that way
Nocivo is harmful to health. An additive mixed in on purpose is el aditivo
A word with a story stays in memory longer than one learned as a “spelling — translation” pair: memory holds on to meaning, not to a string.
In a live sentence
A single word almost never appears alone in conversation. A sentence shows where it fits and what stands next to it.
- El humo lleva sustancias nocivasThe smoke carries harmful impurities
How not to forget this word
Reading a word and remembering it are different jobs. A day later, little survives of a single reading — and that is not bad memory, that is how memory works.
- This has been tested on foreign words too. The difference shows up most when you test yourself a few days later rather than straight away.checked many timesKim & Webb, 2022, Language Learning 72(2) · 48 experiments, 3,411 participants, 98 comparisons.
- Recalling beats re-reading. Covering the translation and trying to remember it does more than reading it ten more times.checked many timesAdesope, Trevisan & Sundararajan, 2017, Review of Educational Research 87(3) · 188 experiments, 272 comparisons. g = 0.61; against plain re-reading 0.51, against passive review 0.93.
- An answer you worked out yourself sticks better than one handed to you.checked many timesBertsch et al., 2007, Memory & Cognition 35(2) · 86 studies, 445 comparisons, d = 0.40.
Frequently asked
How do you say “harmful impurities” in Spanish?
«las sustancias nocivas». In a live sentence: “El humo lleva sustancias nocivas” — The smoke carries harmful impurities. You can hear how it sounds right on this page. Phrase, level B1.
Why does this word look the way it does?
Nocivo is harmful to health. An additive mixed in on purpose is el aditivo. A word with a story stays in memory longer than a “spelling — translation” pair: memory holds on to meaning, not to a string.
Can I hear how it sounds?
Yes, right on this page: click the word and it will play. The sound works on any phone, and nothing needs to be installed.