unseconded

As a noun terms

is .

As an adjective unseconded is

not seconded; not supported, aided, or assisted.

In obsolete|lang=en terms the difference between second and unseconded

is that second is (obsolete) aid; assistance; help while unseconded is (obsolete) not exemplified a second time.

As adjectives the difference between second and unseconded

is that second is number-two; following after the first one with nothing between them the ordinal number corresponding to the cardinal number two while unseconded is not seconded; not supported, aided, or assisted.

As an adverb second

is (with superlative) at the second rank.

As a noun second

is one that is number two in a series or second can be the si unit of time, defined as the duration of 9,192,631,770 periods of radiation corresponding to the transition between two hyperfine levels of caesium-133 in a ground state at a temperature of absolute zero and at rest; one-sixtieth of a minute or second can be one who supports another in a contest or combat, such as a dueller's assistant.

As a verb second

is (uk) to transfer temporarily to alternative employment.