Tôi hiểu nghĩa.

• Tôi = I
• hiểu = understand
• nghĩa = meaning

So the sentence is literally I understand meaning, but in natural English it means I understand the meaning.

Not always. Tôi is a neutral, polite, fairly safe way to say I, so it often appears in textbooks.

In real life, Vietnamese speakers very often use other pronouns based on age, relationship, and social situation, such as em, anh, chị, con, cháu, and so on.

So:

• tôi = a neutral/formal I
• it is correct here
• but it is not the only way to say I

No. Vietnamese verbs do not conjugate the way English verbs do.

So hiểu stays hiểu whether you mean:

• understand
• understood
• will understand
• am understanding

Time is usually shown by context or by extra words such as:

• đã hiểu = understood / understood already
• đang hiểu = understanding
• sẽ hiểu = will understand

In this sentence, hiểu by itself just means understand, with no tense specifically marked.

Here, nghĩa means meaning, sense, or definition, depending on context.

It often refers to the meaning of a word, phrase, or sentence. For example:

• nghĩa của từ này = the meaning of this word

Be aware that nghĩa can have other meanings in other contexts, such as ideas related to duty or affection/loyalty, but that is not what it means here.

Because Vietnamese does not use articles the way English does.

English says:

• I understand the meaning

Vietnamese can simply say:

• Tôi hiểu nghĩa.

The idea of the is understood from context. Vietnamese often leaves that kind of information unstated unless it needs to be made more specific.

Yes, in this sentence it is.

The structure is:

• Tôi = subject
• hiểu = verb
• nghĩa = object

So it follows a basic Subject + Verb + Object pattern, just like I understand the meaning in English.

Của usually means of and is used when you want to show possession or a relationship between nouns.

For example:

• nghĩa của từ này = the meaning of this word
• nghĩa của câu này = the meaning of this sentence

In Tôi hiểu nghĩa., the object nghĩa stands alone because the context is assumed to make clear what meaning is being talked about.

So:

• Tôi hiểu nghĩa. = I understand the meaning.
• Tôi hiểu nghĩa của từ này. = I understand the meaning of this word.

It is understandable, but by itself it sounds a little short or context-dependent.

More natural sentences in everyday Vietnamese might be:

• Tôi hiểu rồi. = I understand now / I get it.
• Tôi hiểu. = I understand.
• Tôi hiểu nghĩa của từ này. = I understand the meaning of this word.
• Tôi hiểu ý nghĩa của câu này. = I understand the meaning/significance of this sentence.

So Tôi hiểu nghĩa. is possible, especially if the context already makes the meaning clear, but it is not the most common standalone sentence.

Both can relate to meaning, but they are not always used in exactly the same way.

• nghĩa often means the direct meaning or definition of a word or expression.
• ý nghĩa often means meaning in a broader sense, especially significance or message.

Examples:

• nghĩa của từ = the meaning of a word
• ý nghĩa của câu chuyện = the significance/meaning of the story

So in many learning situations, nghĩa is the simpler word for the meaning of a word or sentence.

A rough guide is:

• Tôi ≈ toy
• hiểu ≈ hee-uhw
• nghĩa ≈ nghee-uh

A few important notes:

• ng at the start of nghĩa is like the sound at the end of English sing, but here it comes at the beginning of the syllable.
• ngh is just a spelling rule used before certain vowels; it still represents the ng sound.
• Vietnamese tones matter a lot, so an English-style pronunciation will only be approximate.

If you want a very rough full approximation, you could think of it as:

• toy hee-uh nghee-uh

But to sound natural, you need to learn the tones as well, especially on hiểu and nghĩa.