Compounds of 足し

• 足し
  (n) top up (e.g. a little bit to remedy an insufficiency)
• 足し算
  (n) (math) addition
  (P)
• 足し前
  (n) supplement
  addition
• 付足し
  (n) addition
  appendix
  supplement
  postscript
• 用足し
  (n,vs) (1) (transaction of) business
  going about one's business
  purveyor
  (2) going to the washroom
  (P)
• 足しげく
  (adv) frequently
• 足し算器
  (n) adder (spoken)
• 付け足し
  (n) addition
  appendix
  supplement
  postscript
• 足しにする
  (exp,vs-i) to make up (an insufficiency)
  to ease (a lack)
• 足しになる
  (exp,v5r) to be of help
  to be useful
• 足しげく通う
  (exp) to visit frequently
  to haunt