負 （フ） negative, minus

負荷 （フカ） burden, load (electrical, CPU, etc.)

正負 （セイフ） positive and negative (numbers), plus and minus (signs), positive and negative (poles)

非負 （ヒフ） non-negative

負ける （まける） to lose, to be defeated, to succumb, to give in, to surrender, to yield, to be inferior to, to break out in a rash due to (e.g. lacquer, shaving, etc.), to reduce the price, to give a discount, to throw in (something extra) for free

負けるが勝ち （まけるがかち） he that fights and runs away may live to fight another day, sometimes you have to lose to win, losing is winning

負かす （まかす） to defeat

負う （おう） to carry on one's back, to bear, to shoulder, to take (responsibility), to assume, to accept, to bear (the blame, costs, etc.), to have (a duty, obligation, etc.), to become responsible for, to be burdened with (work, debt, etc.), to suffer (an injury), to sustain (a wound), to receive, to incur (a loss, damage, etc.), to owe (a debt of gratitude to), to be indebted to, to have (something) behind one, to be backed by

負うた子に教えられて浅瀬を渡る （おうたこにおしえられてあさせをわたる） some things can be learned from the young, a fool may give a wise man counsel, to be led across the shallows by the child on one's shoulders