وَحْدَهُ alone in Arabic
وَحْدَهُ is how you say “alone” in Arabic.
Root و ح د w-ḥ-d. noun (maṣdar وَحْدٌ + 3rd person suffix pronoun هُ), used adverbially / as a denotative of state. waḥdahu.
Arabic
English
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Meaning of alone in Arabic
- alone, by himself, apart from others the standard fixed phrase, as in رَأَيْتُهُ وَحْدَهُ 'I saw him alone'
- by itself, on its own same construction applied to a thing rather than a person, e.g. هٰذَا عَلَى وَحْدِهِ 'this is by itself'
Example sentence
وَيصير هُوَ وَحدهُ هَمَّهُ دُونَ مَا سِوَاهُ
And He alone becomes his concern, to the exclusion of all else.
وَحْدَهُ alone
An emphasizing accusative 'by Himself alone', with '-hu' (Him) attached — 'He, He alone'. The accusative is a fixed adverbial: exclusively He.
The English is machine-translated.

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How it is used
وَحْدَهُ is not a separate root-word but the maṣdar وَحْدٌ ('being alone') fixed with a suffix pronoun and used adverbially, always in the accusative when not preceded by a preposition — grammarians debated whether this accusative is an adverb of place, an infinitive noun, or a denotative of state (ḥāl), but in all analyses the phrase functions to mean 'alone.' The pronoun changes with the person referred to (وَحْدَهَا 'she alone', وَحْدَهُمْ 'they alone', etc.), and the same pattern appears in the classical declaration لَا إِلٰهَ إِلَّا ٱللّٰهُ وَحْدَهُ 'there is no god but God, alone.'
Words from the same root
- وَاحِدٌ one (the root's core number-sense, underlying تَوْحِيد 'declaring God one')
- تَوْحِيدٌ declaring/believing in the oneness of God; monotheism
- اِتَّحَدَ to become one, to unite (with someone, in interests etc.)
- وَحْدَةٌ being alone, solitude (verbal noun of وَحَدَ/وَحِدَ)
- وَحِيدٌ alone, solitary (adjective)
- أَوْحَدُ unequalled, having no peer (made so by God)
More example sentences
فَقَالَ مُحَمَّدُ بْنُ سُلَيْمَانَ قُولِي لَهُ يَدْخُلْ وَحْدَهُ
So Muhammad ibn Sulayman said, "Tell him to enter alone."
وَحْدَهُ alone
A state-describing word, 'by himself', carrying an attached 'him' suffix that ties the aloneness to the one entering. The suffix anchors the description to its referent.
فَلَا تَكُونُ إِلَّا لِلَّهِ وَحْدَهُ
So it is only for God alone.
وَحْدَهُ alone
This joins the linking wa- to an emphasizing noun, 'alone', carrying a tail -hu that points back to God. The suffix anchors the emphasis to Him specifically, reinforcing exclusivity, so the phrase seals the claim that worship is for God by Himself.
Common questions
- How do you say "alone" in Arabic?
- وَحْدَهُ (waḥdahu), literally 'his being-alone,' is the standard way to say 'alone' when referring to 'he/him' — e.g. رَأَيْتُهُ وَحْدَهُ 'I saw him alone.' The pronoun suffix changes for other persons: وَحْدَهَا (her alone), وَحْدَهُمْ (them alone), وَحْدِي (I alone).
- Is وَحْدَهُ a separate word or built from another word?
- It's built from the noun وَحْدٌ (from the root و ح د, 'aloneness') plus the attached pronoun هُ ('him/his'); it isn't a verb, but a fixed adverbial noun-phrase.
Related words
Definitions summarised from Lane's Arabic-English Lexicon (E. W. Lane, 1863–1893).