ゆううつな(憂鬱な)
gloomy, depressed, melancholy
→ Monday mornings are always utterly gloomy and depressing.
みじめな(惨めな)
wretched, miserable, pitiful
→ Crushingly defeated in the match, I fell into a truly wretched and miserable mood.
つらい(辛い)
painful, heart-breaking, tough, bitter
→ Overtime continuing day after day makes my physical body feel bitterly exhausted.
心細い
helpless, forlorn, disheartened, lonely
→ Walking along the night road all alone feels terribly forlorn and anxious.
弱気な
timid, faint-hearted, defeatist, cowardly
→ You must not become faint-hearted and timid. Maintain your self-confidence.
落ち込む
to feel down, to be depressed, to slump
→ Even if you fail, do not get downhearted; let's put in our best for the next chance.
失望する
disappointment, despair (to be disappointed)
→ I was bitterly disappointed by the movie that I had held such high expectations for.
絶望する
hopelessness, despair (to despair of)
→ No matter how deeply you fall into despair, tomorrow will still dawn without fail.
傷つく
to be hurt, to be wounded (feelings)
→ I was cut to the quick and deeply wounded by his cruel, freezing words.
わずらわしい(煩わしい)
troublesome, cumbersome, vexatious, annoying
→ The administrative procedures were so cumbersome and vexatious that I felt like quitting halfway.
うんざりする
to be fed up with, to be sick and tired of
→ Repeating the exact same job day in and day out has left me thoroughly sick and tired.
戸惑う
to be bewildered, to be perplexed, to be flustered
→ I was thoroughly flustered and bewildered by the sudden marriage proposal.
ためらう(躊躇う)
to hesitate, to waver, to think twice
→ Whenever making an expensive purchase, I invariably end up wavering and hesitating.
申し訳ない
inexcusable, unpardonable, feeling deeply apologetic
→ Having arrived late, my heart is filled with deeply apologetic feelings toward everyone.
すまない(済まない)
sorry, excuse me, pardon (informal apology)
→ I'm truly sorry for calling you up at this unearthly hour.
仕方[が]ない
cannot be helped, inevitable, no use
→ That it rained cannot be helped. Let us alter our planned schedule.
しまった
damn it!, oops!, oh no!, gosh
→ Damn it! I left the house key behind at home.
恐れる
to fear, to be afraid of, to dread
→ If you constantly fear changes, you will never achieve personal growth.
情けない
pathetic, miserable, pitiable, disgraceful
→ To be incapable of thinking of anyone but oneself makes one a truly pathetic person.
恥
shame, embarrassment, disgrace, dishonor
→ Mistaking the person's name right in front of people, I suffered great embarrassment.
別に(〜ない)
not particularly, nothing special (with negative)
→ "Is there anything in particular you want to eat?" "Not particularly, no."
構わない
it doesn't matter, no problem, not minding
→ It doesn't matter at all even if you run a little bit late.
