2-Letter Words Starting with I

Rude

Not vital

Of material washed down from one rock layer to another

Break (in performance)

Perhaps travel in time

Octave, for one

""A large, handsome, North American woodpecker (Campephilus principalis), having a large, sharp, ivorycolored beak. Its general color is glossy black, with white secondaries, and a white dorsal stripe. The male has a large, scarlet crest. It is now rare, and found only in the Gulf States. Campephilus principalis), having a large, sharp, ivorycolored beak. Its general color is glossy black, with white secondaries, and a white dorsal stripe. The male has a large, scarlet crest. It is now rare, and found only in the Gulf States.""

One of the characters in solitary

Singular; distinctive

Bad Religion song about a lone wolf (wordplay)

Occurring in or performed on a living organism: intravital staining techniques.

""Pertaining to, possessing, or like, an involucrum.""

Pertaining to the infinite mood.

Of or pertaining to an inventory.

""INNOVATION The act of innovating; introduction of something new, in customs, rites, etc.""

FLUVIAL pertaining to a {river=n}

PLUVIAL a prolonged period of wet climate

""Open only to persons issued an invitation; -- of gatherings, usually sports events; as, an invitational tournament.as, an invitational tournament.""

""INVOCATION The act or form of calling for the assistance or presence of some superior being; earnest and solemn entreaty; esp., prayer offered to a divine being.""

INVOLUTION The act of involving or infolding.

Between vertebr\'91.

Like "Whose Line Is It Anyway?"

Like comedy that's performed without a script

I am tentative about a theatrical opening that's unrehearsed

IMPROVISATORI

BEHAVIORAL of or pertaining to behavior.

""DIVISIONAL That divides; pas, a divisional line; a divisional general; a divisional surgeon of police. as, a divisional line; a divisional general; a divisional surgeon of police.""

""INDIVIDUAL Not divided, or not to be divided; existing as one entity, or distinct being or object; single; one; as, an individual man, animal, or city. as, an individual man, animal, or city.""

""PROVINCIAL Of or pertaining to province; constituting a province; as, a provincial government; a provincial dialect. as, a provincial government; a provincial dialect.""

""INVESTIGATION The act of investigating; the process of inquiring into or following up; research; study; inquiry, esp. patient or thorough inquiry or examination; as, the investigations of the philosopher and the mathematician; the investigations of the judge, the moralist. as, the investigations of the philosopher and the mathematician; the investigations of the judge, the moralist.""