tact, tang touch contact – a state in which two things touch; tactile – relating to the sense of touch; tangible – able to be touched; intact – with nothing missing.

tax/o arrangement syntax – the systematic arrangement of words; taxonomy – the science of classification; ataxia – loss of the ability to coordinate muscle action.

techno technique, skill technology – the practical application of knowledge; technocracy – rule of technology; technologically – characterized by technology.

tel/e/o far, distant, complete telephone – a device to talk to a distant person; telescope – a device to view distant objects; television – a device to receive pictures from afar; telecommuting – working remotely, bridging the distance via virtual devices.

temp/or time contemporary – existing at the same time; temporal – relating to time; temporary – lasting for a limited time.

term/ina end, limit determine – to find something out at the end of an investigation; terminate – to end; exterminate – to destroy or get rid of completely.

terr/a/i land, earth extraterrestrial – existing outside the earth; terrain – ground or land; territory – an area of land.

tetra four tetrapod – having 4 legs; tetrarchy – government by 4 rulers; tetrose – a monosaccharide with four carbon atoms.

the/o god monotheism – belief in one god; polytheism – worshiping more than one god; theology – the study of religion, god, etc.

therm/o heat thermal – relating to heat; thermos – an insulated jar that keeps heat in; thermostat – a device that controls heat.

tort twist contortion – a twisted shape or position; distort – to alter the shape or condition of; retort – reply in a manner that is supposed to change the effect of something previously said.

tox poison detoxification - the process of removing poisons; toxic – poisonous; toxicology – the study of poisons; intoxicated – influenced by drugs.

tract pull, drag attract – to pull objects nearer; distract – to drag attention away from something; tractor – a motor vehicle that pulls things.

trans across,beyond, through transcontinental – across the continent; transfer – to move from one place to another; transport – to carry something across a space.

tri three, once in every three, third triangle – a figure with 3 sides and 3 angles; triathlon – an athletic contest with 3 events; tricycle – a 3-wheeI vehicle with pedals.