birching is birch's Present Participle

birch

US [bɜrtʃ]
UK [bɜː(r)tʃ]
  • n.【植】桦树;白桦;【植】桦木;桦条
  • v.用桦条打
  • Web白桦树;伯奇;西南桦木
Plural Form:birches  Past Participle:birched  Present Participle:birching  
n.
1.
【植】桦树; 白桦
2.
【植】桦木
3.
桦条,旧时多用于体罚
v.
1.
用桦条打