Answer:
宀+一+八+ニ The "Ukanmuri" radical - roof, house / ICHI, ITSU, hito(tsu) - one / HACHI, ya(ttsu), ya(tsu), ya, yo - eight / Katakana "Ni"
｜+｜+一+ハ The "Tatebou" radical - vertical stroke / ICHI, ITSU, hito(tsu) - one / HACHI, ya(ttsu), ya(tsu), ya, yo - eight
日+水 NICHI, JITSU, hi, ka - sun, day / SUI, mizu - water
ハ+一+十+八 HACHI, ya(ttsu), ya(tsu), ya, yo - eight / ICHI, ITSU, hito(tsu) - one / JUU, tou, to - ten
木+再 MOKU, BOKU, ki - tree / SAI, SA, futata(bi) - once more, again, twice
Add 井 (SEI, SHOU, i - well) and they will all do well!
寒 KAN, samu(i) - cold
典 TEN - law, code, ceremony
暴 BOU, BAKU, aba(reru), aba(ku) - rage, rampage, expose
兼 KEN, ka(neru) - combine, double as, cannot
構 KOU, kama(eru), kama(u) - build, set up, look after