Meanings

the four arithmetical operations (addition, subtraction, multiplication, division)

manufacturing industry

processing cost

adder (written)

looseleaf

assistance

accomplice

NTT permission-to-procure-a-phone-line

additional ration

extra allowance

participant

vulcanizing (rubber)

condition of fire

irresponsible

those interested in participating

participation

participant

measuring by feel

to add (e.g. a postscript)

to be added to