acetylsalicylic acid

a headache (pain or ache in the head)

to soften; to relieve; to ease; to appease; to pacify

to have fever / to heat up

fever (having higher body temperature than normal condition) / (sciences) heat (a phenomenon of heating)

to use / to employ / to make use of, to apply / to spend

sourness (quality or condition) / (chemistry) acid

well done; good job

(emphatic) Alternative form of よく (yoku)

adverbial form of よい (yoi, “good”) / adverbial form of いい (ii, “good”) / 良く, 善く, 克く: good, well / 良く: frequently, often / 良く, 善く: having astonishing ability or guts / 能く: (literary) able to