Stage 2-3

to catch a cold

kaze o hiku

fever

netsu

to eat out

gaishoku suru

promise

yakusoku

definitely / absolutely

zettai ni

to give up

akirameru

grammar

bumpō

complicated

fukuzatsu

learning / studying

gakushū

lecture

kōgi

to attend (a lecture) / to appear / to show up

(kōgi ni) deru

problem / question / issue

mondai

to recall / to remember

omoidasu

to memorize

oboeru

next time

kondo

to become thin / to lose weight

yaseru

to become fat / to gain weight

futoru

hospital / doctor's office

byōin

medicine

kusuri

to be effective / to work

kiku

counter for pills

jō

at intervals of / every (e.g. every 4 hours)

oki ni

embassy

taishikan

to work (general labor/employment)

hataraku

to be employed (to serve an employer/hold a post)

tsutomeru

letter

tegami

post office

yūbinkyoku

postage stamp

kitte

postcard

hagaki

apartment (usually cheaper/rental)

apāto

bicycle

jitensha

ring

yubiwa

to sell

uru

to be sold

ureru

condominium / high-grade apartment

manshon

at first / initially

saisho ni

umbrella

kasa

to put up/open an umbrella

(kasa o) sasu

to invite (normally to one's home) / to call out to

yobu

to invite (anywhere including outside places)

sasō

to get disappointed

gakkari suru

last / final

saigo

to get angry

okoru

to be surprised

bikkuri suru