TENUOUS
flimsy, fragile, slight, tenuous, thin
(adjective) lacking substance or significance; “slight evidence”; “a tenuous argument”; “a thin plot”; “a fragile claim to fame”
tenuous
(adjective) very thin in gauge or diameter; “a tenuous thread”
tenuous
(adjective) having thin consistency; “a tenuous fluid”
Source: WordNet® 3.1
Etymology
Adjective
tenuous (comparative more tenuous, superlative most tenuous)
Thin in substance or consistency.
Synonyms: delicate, gossamer, Thesaurus:fragile
Insubstantial.
Synonyms: ethereal, Thesaurus:insubstantial
Source: Wiktionary
Ten"u*ous, a. Etym: [L. tenuis thin. See Thin, and cf. Tenuis.]
1. Thin; slender; small; minute.
2. Rare; subtile; not dense; -- said of fluids.
Definition: Lacking substance, as a tenuous argument.
Source: Webster’s Unabridged Dictionary 1913 Edition