Rom. 14:2 KJV (With Strong’s)

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2
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ho (Greek #3588)
the definite article; the (sometimes to be supplied, at others omitted, in English idiom)
KJV usage: the, this, that, one, he, she, it, etc.
Pronounce: ho
Origin: ἡ (hay), and the neuter τό (to) in all their inflections
For
men (Greek #3303)
properly, indicative of affirmation or concession (in fact); usually followed by a contrasted clause with 1161 (this one, the former, etc.)
KJV usage: even, indeed, so, some, truly, verily. Often compounded with other particles in an intensive or asseverative sense.
Pronounce: men
Origin: a primary particle
one
hos (Greek #3739)
the relatively (sometimes demonstrative) pronoun, who, which, what, that
KJV usage: one, (an-, the) other, some, that, what, which, who(-m, -se), etc. See also 3757.
Pronounce: hos
Origin: ἥ (hay), and neuter ὅ (ho) probably a primary word (or perhaps a form of the article 3588)
believeth
pisteuo (Greek #4100)
to have faith (in, upon, or with respect to, a person or thing), i.e. credit; by implication, to entrust (especially one's spiritual well-being to Christ)
KJV usage: believe(-r), commit (to trust), put in trust with.
Pronounce: pist-yoo'-o
Origin: from 4102
that he may eat
phago (Greek #5315)
to eat (literally or figuratively)
KJV usage: eat, meat.
Pronounce: fag'-o
Origin: a primary verb (used as an alternate of 2068 in certain tenses)
all things
pas (Greek #3956)
apparently a primary word; all, any, every, the whole
KJV usage: all (manner of, means), alway(-s), any (one), X daily, + ever, every (one, way), as many as, + no(-thing), X thoroughly, whatsoever, whole, whosoever.
Pronounce: pas
Origin: including all the forms of declension
: another
de (Greek #1161)
but, and, etc.
KJV usage: also, and, but, moreover, now (often unexpressed in English).
Pronounce: deh
Origin: a primary particle (adversative or continuative)
, who is weak
astheneo (Greek #770)
to be feeble (in any sense)
KJV usage: be diseased, impotent folk (man), (be) sick, (be, be made) weak.
Pronounce: as-then-eh'-o
Origin: from 772
, eateth
esthio (Greek #2068)
used only in certain tenses, the rest being supplied by 5315; to eat (usually literal)
KJV usage: devour, eat, live.
Pronounce: es-thee'-o
Origin: strengthened for a primary ἔδω (to eat)
herbs
lachanon (Greek #3001)
a vegetable
KJV usage: herb.
Pronounce: lakh'-an-on
Origin: from λαχαίνω (to dig)
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Cross References

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that.
another.
eateth.

J. N. Darby Translation

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2
One man is assured that he may eat all things; but the weak eats herbs.

W. Kelly Translation

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One person hath faith to eat all things, but he that is weak eateth herbs.