to study / to learn

a weld; welding

to weld, to weld together

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend

distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend

he; boyfriend

technology; technique; technical

welder

arc welding

butt welding