まず第１に、喫煙者は、自分はタバコの害を免れるだろうと思っている（もっとも、どんな喫煙者でも少なくとも短期的な影響を免れることはないのだが）。

Sentence Analyzer

English Translation

First they think that they will escape (although no smoker escapes at least the short-term effects).

Furigana

まず第(だい)１に、喫煙者(きつえんしゃ)は、自分(じぶん)はタバコの害(がい)を免(まぬか)れるだろうと思(おも)っている（もっとも、どんな喫煙者(きつえんしゃ)でも少(すく)なくとも短期的(たんきてき)な影響(えいきょう)を免(まぬか)れることはないのだが）。

Romanji

Mazu dai ichi ni, kitsuensha wa, jibun wa tabako no gai o manukareru darou to omotteiru mottomo, donna kitsuensha de mo sukunakutomo tankiteki na eikyō o manukareru koto wa nai no da ga.

Words

先ず (まず)

first (of all); to start with; about; almost; anyway; well; now; hardly (with neg. verb)

第 (だい)

ordinal

一 (いち)

one; best; first; foremost; beginning; start; bottom string (on a shamisen, etc.)

に (に)

at (place, time); in; on; during; to (direction, state); toward; into; for (purpose); because of (reason); for; with; by; from; as (i.e. in the role of); per; in; for; a (e.g. "once a month"); and; in addition to; if; although

喫煙者 (きつえんしゃ)

smoker

は (は)

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

自分 (じぶん)

myself; yourself; oneself; himself; herself; I; me; you

煙草 (たばこ、えんそう、けぶりぐさ、けむりぐさ、タバコ)

tobacco; cigarette; cigaret; cigar; tobacco plant (Nicotiana tabacum)

の (の)

indicates possessive; nominalizes verbs and adjectives; substitutes for "ga" in subordinate phrases; (at sentence-end, falling tone) indicates a confident conclusion; (at sentence-end) indicates emotional emphasis; (at sentence-end, rising tone) indicates question

害 (がい)

injury; harm; evil influence; damage

を (を)

indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.

免れる (まぬがれる、まぬかれる)

to escape from; to be rescued from; to avoid; to evade; to avert; to elude; to be exempted; to be relieved from pain; to get rid of

だ (だ)

be; is; indicates past or completed action; indicates light imperative

と (と)

if; when; and; with; particle used for quoting (with speech, thoughts, etc.); quoting particle; promoted pawn; indicates question (sentence end)

思う (おもう)

to think; to consider; to believe; to think (of doing); to plan (to do); to judge; to assess; to regard; to imagine; to suppose; to dream; to expect; to look forward to; to feel; to desire; to want; to recall; to remember

尤も (もっとも)

but then; although; though; reasonable; natural; just

どんな (どんな)

what; what kind of; (with -temo, demo, etc.) any(body, thing, means, etc.)

で (で、にて)

indicates location of action; at; in; indicates time of action; indicates means of action; cause of effect; by; and then; so; indicates continuing action; indicates certainty, emphasis, etc.

も (も)

too; also; in addition; as well; (not) either (in a negative sentence); both A and B; A as well as B; neither A nor B (in a negative sentence); even; as much as; as many as; as far as; as long as; no less than; no fewer than; even if; even though; although; in spite of; further; more; again; another; the other

少なくとも (すくなくとも)

at least

影響 (えいきょう)

influence; effect; to influence; to affect; to have an influence on; to impact; to have an effect on

事 (こと、こん)

thing; matter; incident; occurrence; event; something serious; trouble; crisis; circumstances; situation; state of affairs; work; business; affair; after an inflectable word, creates a noun phrase indicating something the speaker does not feel close to; nominalizing suffix; pretending to ...; playing make-believe ...; alias; aka; nickname; alternative name; also known as

ない (ない)

not; emphatic suffix

が (が)

indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and