重

redundant keigo (i.e. improper use of the -rareru honorific form together with an honorific verb such as ossharu)

curb weight; kerb weight

double exposure

Proverb

there's but a fine line between genius and insanity

Linguistics

diphthong

Chemistry

double bond

dual diplomacy

Computing

multiplexing; multiprocessing

overstressing academic background

combination of colors created by layering of garments (colours)

automobile weight tax

double taxation

principle of superposition; superposition principle

to repeat

third-rate company director; executive in name only

Company name

Fuji Heavy Industries

bicarbonate

double blind test; double blind trial

Idiomatic expression

to nitpick; to complain about trifles

'taru' adjective

mountains rising one above another

Computing

overstrike

Medicine

severe fever with thrombocytopenia syndrome; SFTS

crest-decorated habutae (silk fabric used as a cloth for lining high-quality kimono); figured habutae

baking soda; sodium bicarbonate