Word
reliable
Phoneticsre·li·able
US/ɹiˈɫaɪəbəɫ/
UK/ɹɪlˈaɪəbəl/
Definitions
01trustworthy or dependable
B1 · Intermediate
adj. someone or something you can trust to behave well or work correctly.
adj. consistent in performance or behaviour; able to be trusted to do what is expected.
日本語:確か※
“My old car is very reliable and has never broken down on a long trip.”
“The company is looking for a reliable contractor who can guarantee the project will be finished before the winter holidays.”
Synonyms
Antonyms
02data transmission
C1 · Advanced Computing Technical
adj. a system that makes sure information reaches its destination safely.
adj. referring to a protocol that ensures data packets reach their destination or notifies the sender of failure.
日本語:確実※
“A reliable network connection is essential for making clear video calls.”
“TCP is considered a reliable transport protocol because it manages retransmissions to ensure that the data stream remains intact.”
Synonyms
Antonyms
03a dependable person or thing
B2 · Upper Intermediate Countable noun Informal
n. a person or thing that you can always depend on.
n. an entity that is consistently dependable; often used in the phrase 'old reliable'.
“When the new printer broke, we had to use 'old reliable' in the corner.”
“Among all the flashy new gadgets, this manual typewriter remains the office reliable whenever the power goes out.”
Collocations
Common phrases and expressions where native English speakers use the word “reliable” in context.
Adjective
01. reliable assessment
“The teacher provided a reliable assessment of the student's progress.”
adj + noun
02. reliable data
“We need reliable data before we can make a final decision.”
adj + noun
03. reliable evidence
“There is no reliable evidence to support his claims.”
adj + noun
04. reliable indicator
“A high fever is often a reliable indicator of an infection.”
adj + noun
05. reliable information
“It is difficult to find reliable information on the internet these days.”
adj + noun
06. reliable measure
“Standardized tests are not always a reliable measure of intelligence.”
adj + noun
07. reliable method
“Scientists are looking for a more reliable method of predicting earthquakes.”
adj + noun
08. reliable result
“The experiment must be repeated to ensure a reliable result.”
adj + noun
09. reliable source
“The journalist got the news from a very reliable source.”
adj + noun
10. reliable way
“Public transport is a reliable way to get to the city center.”
adj + noun
11. reliable access
12. merit reliable
Etymology
From rely + -able.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.
Word family
NOUN
ADJECTIVE
ADVERB
- Exam level
- CambridgeCambridgeCambridge English QualificationsThe exam suite from Cambridge University Press & Assessment, from A1 Movers up to C2 Proficiency. The benchmark names double as CEFR labels.B1 PreliminaryIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.4.0–5.0TOEFL iBTTOEFL iBTTest of English as a Foreign Language, Internet-Based TestETS's academic English test, the standard route for US university admissions. Scored 0–120, with a 1–6 scale since 2026.1–6 scale: 3.0–3.544–71TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.550–784
- Frequency
- Common
- Level
- B1 · IntermediateOxford
- Updated
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QR code
englishreference.com/q/reliable
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「日本語」 data: JMdict (EDRDG), CC BY-SA 4.0