GUERRILLA
guerrilla, guerilla, irregular, insurgent
(noun) a member of an irregular armed force that fights a stronger force by sabotage and harassment
Source: WordNet® 3.1
Etymology
Noun
guerrilla (plural guerrillas)
A soldier in a small independent group, fighting against the government or regular forces by surprise raids.
(now rare) A non-official war carried out by small independent groups; a guerrilla war.
Adjective
guerrilla (comparative more guerrilla, superlative most guerrilla)
(military) Relating to, using, or typical of guerrilla warfare, or its principles of small independent or non-official perpetrators.
(marketing) Relating to, using, or typical of guerrilla marketing.
Source: Wiktionary
Guer*ril"la, n. Etym: [Sp., lit., a little war, skirmish, dim. of
guerra war, fr. OHG. werra discord, strife. See War.]
1. An irregular mode of carrying on war, by the constant attacks of
independent bands, adopted in the north of Spain during the
Peninsular war.
2. One who carries on, or assists in carrying on, irregular warfare;
especially, a member of an independent band engaged in predatory
excursions in war time.
Note: The term guerrilla is the diminutive of the Spanish word
guerra, war, and means petty war, that is, war carried on by detached
parties; generally in the mountains. . . . A guerrilla party means,
an irregular band of armed men, carrying on an irregular war, not
being able, according to their character as a guerrilla party, to
carry on what the law terms a regular war. F. Lieder.
Guer*ril"la, a.
Definition: Pertaining to, or engaged in, warfare carried on irregularly
and by independent bands; as, a guerrilla party; guerrilla warfare.
Source: Webster’s Unabridged Dictionary 1913 Edition