dire - doub
- direct action design
- direct adaptation
- direct addition
- direct admittance
- direct analogy
- direct analysis
- direct ancestor
- direct approach
- direct assay
- direct assessment
- direct automorph
- direct bearing
- direct burial cable
- direct calculation
- direct call
- direct capacitance
- direct capacitance to earth
- direct check
- direct cofactor
- direct cohomology group
- direct communication
- direct comparison
- direct composition
- direct computation
- direct conclusion
- direct congruent
- direct connection
- direct consequence
- direct construction
- direct continuation
- direct contradiction
- direct convergence
- direct converse
- direct correspondence
- direct couple
- direct coupling
- direct current brake
- direct current injection
- direct current injection brake
- direct decoding
