Pernicious

Causing insidious harm or ruin; ruinous; injurious; hurtful.
Found on http://www.knotweed-uk.com/Glossary.htm

Pernicious

• (a.) Quick; swift (to burn). • (a.) Having the quality of injuring or killing; destructive; very mischievous; baleful; malicious; wicked.
Found on http://thinkexist.com/dictionary/meaning/pernicious/

pernicious

(L. perniciosus) tending to a fatal issue.
Found on http://users.ugent.be/~rvdstich/eugloss/DIC/dictio66.html

pernicious

(pәr-nish´әs) tending to a fatal outcome.
Found on http://www.encyclo.co.uk/local/21001

Pernicious

Per·ni'cious adjective [ Latin pernix , -icis .] Quick; swift (to burn). [ R.] Milton.
Found on http://www.encyclo.co.uk/webster/P/59

pernicious

destructive; ruinous; fatal
Found on http://phrontistery.info/p.html

pernicious

exceedingly harmful
Found on https://www.vocabulary.com/lists/151466

pernicious

exceedingly harmful
Found on https://www.vocabulary.com/lists/412284

pernicious

harmful injurious 
Found on http://www.graduateshotline.com/list.html

pernicious

pernicious 1. Causing great harm, destruction, or death. 2. Wickedness or causing harm; perniciously.
Found on http://www.wordinfo.info/words/index/info/view_unit/1377/

pernicious

Tending to a fatal issue. ... Origin: L. Perniciosus ... (18 Nov 1997) ...
Found on http://www.encyclo.co.uk/local/20973

pernicious

Type: Term Pronunciation: per-nish′ŭs Definitions: 1. Destructive; harmful; denoting a disease of severe character and usually fatal without appropriate treatment.
Found on http://www.medilexicon.com/medicaldictionary.php?t=67380
No exact match found