infrequent

词形变化：

副词: infrequently | 名词: infrequence |

同义词：

rare | scarce | uncommon | occasional | irregular | sparse | scattered | unique | few and far between | sporadic | intermittent | few | fitful |

反义词：

frequent |

词义辨析：

同义:

a.稀少的; 不规则的

rare

scarce

sparse

scattered

occasional

uncommon

irregular

同义参见:

unique

rare¹

反义:

a.不经常的; 罕见的

frequent