had been strengthening
-había estado fortaleciendo
Past perfect progressiveconjugation ofstrengthen.There are other translations for this conjugation.
See all conjugations of strengthen

strengthen

TRANSITIVE VERB
(to make physically stronger)-fortalecer
Synonyms for strengthen
reinforce
reforzar
brace
reforzar
build up
ganar
fortify
fortificar
get stronger
ser más fuerte
steel
N/A
Antonyms for strengthen
impair
perjudicar
undercut
debilitar
weaken
debilitar
weaken
debilitarse
wear
desgastar
worsen
empeorar
TRANSITIVE VERB
(to make more stable)-fortalecer
Synonyms for strengthen
bolster
reforzar
Antonyms for strengthen
destabilize
desestabilizar
waste
malgastar
wear
desgastar
TRANSITIVE VERB
(to increase)-acrecentar
Synonyms for strengthen
increase
aumentar
boost
estimular
Antonyms for strengthen
atrophy
atrofiarse
reduce
reducir
wear
desgastar
INTRANSITIVE VERB
(to gain physical strength)-fortalecerse
Synonyms for strengthen
improve
mejorar
reinforce
reforzar
Antonyms for strengthen
disable
dejar inválido
harm
dañar
waste
malgastar
injure
herir
wear
desgastar
INTRANSITIVE VERB
(to become more stable)-fortalecerse
Synonyms for strengthen
fortify
fortalecer
bolster
reforzar
Antonyms for strengthen
cripple
paralizar
destabilize
desestabilizar
wear
desgastar
INTRANSITIVE VERB
(to increase)-acrecentarse
Synonyms for strengthen
mushroom
crecer rápidamente
Antonyms for strengthen
atrophy
atrofiarse
decrease
disminuir
minimize
minimizar
wear
desgastar
Other Dictionaries
Explore the meaning of strengthen in our family of products.
Dictionary.com
Dictionary.com
What is the definition of “strengthen”?
Thesaurus.com
Thesaurus.com
What are synonyms of “strengthen”?
Vocabulary.com
Vocabulary.com
What does “strengthen” mean?
FrenchDictionary.com
FrenchDictionary.com
How do you say “strengthen” in French?
Random Word
Roll the dice and learn a new word now!
Get a Word
Want to Learn Spanish?
Spanish learning for everyone. For free.
Translation
The world’s largest Spanish dictionary
Conjugation
Conjugations for every Spanish verb
Vocabulary
Learn vocabulary faster
Grammar
Learn every rule and exception
Pronunciation
Native-speaker video pronunciations
Word of the Day
el murciélago
bat
Word of the Day
bat
el murciélago
SpanishDictionary.com is the world's most popular Spanish-English dictionary, translation, and learning website.
FEATURES
Translation
Conjugation
Vocabulary
Learn Spanish
Grammar
Word of the Day
ABOUT
About Us
Privacy
Terms
Site Map
Help
Contact Us
SOCIAL NETWORKS
Facebook
X
X
Instagram
APPS
Apple
iOS
Android
Android
IXL learning logo

Making educational experiences better for everyone.

English dictionary and learning for Spanish speakers

French-English dictionary, translator, and learning

Immersive learning for 25 languages

Comprehensive resource for word definitions and usage

Essential reference for synonyms and antonyms

Adaptive learning for English vocabulary

Fast, easy, reliable language certification

Fun educational games for kids

Trusted tutors for 300+ subjects

Comprehensive K-12 personalized learning

Marketplace for millions of educator-created resources

35,000+ worksheets, games, and lesson plans

Copyright © 2025 Dictionary Media Group, Inc., a division of IXL Learning • All Rights Reserved.