unstable section

[ʌnˈsteɪbəl ˈsɛkʃən]
nounpl: unstable sections
🇧🇷 seção instável
1. A portion or segment of a structure, system, or material that lacks stability and is prone to movement, collapse, or change
The engineers identified an unstable section of the bridge that required immediate reinforcement.
Os engenheiros identificaram uma seção instável da ponte que necessitava de reforço imediato.
2. In geology or mining, an area of rock or soil susceptible to landslides or subsidence
The unstable section of the hillside posed a risk to the nearby residential area.
A seção instável da encosta representava um risco para a área residencial próxima.
3. In chemistry or physics, a state of matter or molecular configuration that is temporarily sustained but prone to rapid change
The unstable section of the reaction mixture required careful temperature control.
A seção instável da mistura de reação exigia controle cuidadoso da temperatura.
💡 This term is primarily used in technical, scientific, and engineering contexts in both Brazilian Portuguese and English-speaking countries. In Brazil, it appears frequently in infrastructure reports and geological surveys, particularly relevant given the country's diverse topography. The phrase reflects universal concerns about structural safety and environmental risk management.
Synonyms / Sinônimos
precarious sectionunsteady sectionunstable areaweak pointvulnerable segment
Antonyms / Antônimos
stable sectionsecure areasolid portionfirm segment

Regional Variations

🇧🇷
General Brazilian
seção instável
Standard usage in engineering and technical contexts
🌴
Rio de Janeiro
seção instável / área frágil
Common in geological surveys due to mountainous terrain
🏙️
São Paulo
seção instável / trecho instável
Used in urban infrastructure and construction discussions
🇵🇹
Portugal
secção instável
Alternative spelling with 'secção' used in European Portuguese

Related Words

structural integritystructural failureload-bearingreinforcementstability assessmentgeotechnical engineering

Related Idioms & Phrases

a house built on sand
the weak link in the chain
on shaky ground
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