Japanese Language Proficiency Test, JLPT.

steady, solid, sure-footed / sound, trustworthy

steadiness / trustworthiness

improvement, progress

improve, rise

the Japanese language

ability; capability; capacity; faculty

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