HAPHAZARD
haphazard, slapdash, slipshod, sloppy
(adjective) marked by great carelessness; “a most haphazard system of record keeping”; “slapdash work”; “slipshod spelling”; “sloppy workmanship”
haphazard, hit-or-miss
(adjective) dependent upon or characterized by chance; “a haphazard plan of action”; “his judgment is rather hit-or-miss”
haphazard, haphazardly
(adverb) without care; in a slapdash manner; “the Prime Minister was wearing a grey suit and a white shirt with a soft collar, but his neck had become thinner and the collar stood away from it as if it had been bought haphazard”
Source: WordNet® 3.1
Etymology
Adjective
haphazard (not comparable)
Random; chaotic; incomplete; not thorough, constant, or consistent.
Synonyms: random, chaotic
Antonym: systematic
Source: Wiktionary
Hap"haz`ard, n. Etym: [Hap + hazard.]
Definition: Extra hazard; chance; accident; random.
We take our principles at haphazard, upon trust. Locke.
Source: Webster’s Unabridged Dictionary 1913 Edition