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to rely upon

to rely upon

33 2.3
Trust someone or something to do what you need
  • phrasal verb
  • /rɪˈlaɪ əˈpɒn/
translation icon : contar con
  • You can always rely upon her to keep your secrets safe.
  • rely upon heavily
  • rely upon human judgment
  • rely upon solely

And being able to rely upon that to keep everything going.

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Examples

  • In times of crisis, we must rely upon each other for support.

  • They rely upon the internet for most of their information.

  • I mean you can rely upon what he tells you.

  • Those who are just about managing also rely upon our public services.

  • Gentlemen... We have a sensitive issue, which I know I can rely upon you to assist with.

  • You can rely upon Harris, Colonel.

  • Please tell your sister that I have many relations, friends, and colleagues who rely upon me daily.

  • So he felt that he was the only one who could be trusted, who could be relied upon to build these things.

  • I would be there part of the time, but I'm relying upon him to be my resident manager.

    Fiction book (1992)
  • Michael Mulvaney was one member they could rely upon, and they knew it.

    Fiction book (1997)

Synonyms

to trust
vsto rely upon
1.0

To believe someone will do what they say

focuses on needing practical help or support rather than simply believing
to count on
vsto rely upon
700 1.8

To trust a person or thing to do what you need

covers broader confidence and support beyond just expecting actions
to rely on
vsto rely upon
602 1.0

Trust a person or thing to do what you expect

emphasizes general confidence rather than only expecting specific actions
to depend on
vsto rely upon
309 1.0

Need help or support from something to live

emphasizes trust and confident expectation rather than urgent necessity for survival
to depend upon
vsto rely upon
8 2.5

To trust a person or thing to give support

is the same sense but differs only in phrasing or formality

How Dependent

to count on
700 1.8
to rely upon
33 2.3
to depend on
309 1.0

Surface Forms

rely upon infinitive
relied upon past participle
relying upon present participle
relies upon third person singular

Morphology

rely + upon

The meaning 'to depend on or trust' is directly derivable from combining 'rely' (to trust or depend) with the preposition 'upon' (a formal variant of 'on' indicating relation). This verb + preposition composition follows standard, cross-linguistic patterns and would be readily understood by a B1 learner who knows the constituent words.

Etymology

Rely upon comes from a simple image of leaning on someone or something for support. If you literally lean on a friend, rely is like leaning and upon is like 'on top of', so rely upon means 'to depend on or trust'.